CHANGES TO REMIND

* VERSION 06.03.01 - 2026-08-24

- DOCUMENTATION FIX: Update to current text of GPL version 2.0,
  pointed out by Dick Marinus.

- INCLUDED FILES: include/sun.rem: Guard against errors if a day lacks
  a sunrise or sunset.

- MINOR IMPROVEMENT: tkremind: The configure script looks for tclsh,
  wish, and a few common versioned-names thereof.  It prefers tclsh,
  but falls back to wish.

- MINOR IMPROVEMENT: remind: Fix code in a few places that was causing
  "make cppcheck" warnings.

- MINOR CHANGE: tkremind: Disable the "ibus" input method.  It makes
  Tcl/Tk programs very slow; see
  https://github.com/ibus/ibus/issues/2924

- CLEANUPS: Cleanup and simplification of the "make test" target,
  courtesy of Jochen Sprickerhof.

- BUG FIX: remind: Cast all arguments to functions in ctype.h to
  unsigned char.  Remind was technically using these functions
  incorrectly, but only NetBSD was picky enough to actually make them
  fail.

* VERSION 06.03.00 - 2026-08-20

- MAJOR NEW FEATURE: remind: Add support for a small markup language
  (a subset of the Pango markup language) that lets your format
  reminders on the terminal (being able to change foreground and
  background color, font weight, underline, strikethrough, and font
  slant.)  This same markup language works with the rem2pdf, rem2html
  and TkRemind back-ends.  This feature was triggered by a request
  from Joel Young.  See the section "FORMATTED REMINDERS" in the
  remind(1) man page for details.

  NOTE: In the terminal, marked-up reminders are formatted specially
  only if the "-@" command-line option is used.

  Marked-up reminders are indicated with either:
      REM ... SPECIAL FORMATTED <b>Markup!</b>
  or:
      REM ... FMT <b>Markup!</b>

  The latter is merely syntactic sugar for the former.

  ***** IMPORTANT NOTE FOR USERS: *****

  Whereas Remind has typically been pretty chill about what you put in
  the body of a REM command, treating it as just a bunch of bytes, for
  FMT-style reminders, you have to use valid multibyte characters.  If
  you use a UTF-8 locale, that means everything after the FMT has to
  be valid UTF-8 or else Remind will throw an error.  That's because
  it has to parse the body of the reminder rather than treating it as
  a bunch of bytes.

  If you are not using a UTF-8 locale... you should be.

  ***** IMPORTANT NOTE FOR BACK-END AUTHORS: *****

  If you maintain a Remind back-end that consumes "remind -pp" or
  "remind -ppp" output, FMT-style reminders are given a "passthru"
  value of "FORMATTED".  By default, your back-end should ignore these
  reminders.

  If you run Remind with the "--no-fmt" option, however, FMT-style
  reminders have the formatting tags stripped and are sent to the
  back-end as normal MSG-style reminders (i.e., no "passthru")

  Back-end authors have three choices:

  1) Do nothing and ignore FORMATTED reminders.

  2) Invoke Remind with --no-fmt (or tell users to do so) so that
     FORMATTED reminders are treated as unformatted reminders.

  3) Actually support the FORMATTED passthru by interpreting the
     markup yourself.

- DEPRECATIONS:  Both rem2html and rem2pdf issue a deprecation warning
  if fed data from "remind -p".  You should use "remind -pp" or
  "remind -ppp" with both of those back-ends; the older "-p" interchange
  format cannot communicate all the information the back-ends need to
  reliable handle FMT-style reminders.

- MINOR NEW FEATURE: remind: You can specify the reminder script to read
  with a "--file=pathname" option.  This simplifies writing wrapper scripts
  that pre-set a default file because you can have options that come after
  the filename.  This same option applies to the "rem" symbolic link too.
  Suggested by Ian! D. Allen.

- MINOR IMPROVEMENT: TkRemind: Running "tkremind --version" works even
  if there's no X11 display.  Suggested by Tim Chase.

- MINOR IMPROVEMENT: remind: The variable $DefaultColour is an alias
  for $DefaultColor; either may be set with the same effect.

- MINOR IMPROVEMENT: TkRemind: When running the Remind daemon,
  tkremind would leave an extraneous /bin/sh process running too.
  This has been fixed.

- DOCUMENTATION IMPROVEMENT: Merge the rem(1) and remind(1) man pages
  based on a suggestion from Ian! D. Allen.

- CONSISTENCY IMPROVEMENT: rem: Look first at the environment variable
  $REMIND_FILE and then fall back on $DOTREMINDERS.  This is for
  consistency with the --file= command-line option.

- MINOR DOCUMENTATION IMPROVEMENTS: remind: Added a few clarifications
  to the remind(1) man page.

- TEST IMPROVEMENTS: Add tests for rem2html and rem2pdf.
  Unfortunately, the output of rem2pdf differs based on the Pango
  version, so this test is not run by default.

- BUG FIX: remind:  "remind -c" would sometimes split a line early when
  the next word on the line would have fit in the calendar box (and thus
  could make the calendar box unnecessarily high.)  This has been fixed.

- BUG FIX: tkremind: If tkremind is invoked on a filename containing a
  dash, it could get confused and interpret the filename as command-line
  options, with confusion and hilarity ensuing.

* VERSION 06.02.10 - 2026-08-05

- IMPROVEMENT: TkRemind: Theme *all* dialogs and popups according to
  the selected color scheme.  No more surprisingly-bright popups when
  you go to create a new reminder in Dark Mode.

  Note that to fully support this, two new color options have been
  added.  If you've customized your colors (ie, are using something
  other than the built-in Light and Dark themes) you will need to set
  the new options "Active entry background" and "Disabled entry
  background".  TkRemind will warn you if your options file was
  created by an older version of TkRemind, and will prompt you to
  update and save the options.

- IMPROVEMENT: TkRemind: If you resize the "Help" window, the man page
  text is re-flowed to adjust to the new size.

- DOCUMENTATION FIX: TkRemind: The tkremind man page has been updated
  and some inaccuracies corrected.

- IMPROVEMENT: Remind: Better reporting of "too many arguments" error
  when parsing expressions.

- BUG FIX: TkRemind: If the date rolls over from one month to the
  next, properly update the calendar display to the new month.

* VERSION 06.02.09 - 2026-07-28

- IMPROVEMENT: remind: When compiling an expression, keep pointers to
  system variables instead of storing names.  This avoids having to
  look up the system variable by name each time it is evaluated.  This
  improves efficiency, though probably not by a noticeable amount.

- IMPROVEMENT: remind: In several places, replace a series of
  "if ... else if ... else ..." sequences with "switch ... case ..."
  Again, this probably improves efficiency, and again, probably not
  noticeably.

- IMPROVEMENT: remind: Emit more helpful error messages if Remind is
  unable to open a file.

- IMPROVEMENT: remind: Add three new system variables to limit Remind
  from consuming all of memory if you feed it pathological input.  If
  you set the variables to zero, then Remind falls back to its
  previous behavior of trusting that you know what you are doing.

  The three new variables are:

  o $MaxIncludeCmdLines - default 10000.  Limit the output of an
    INCLUDECMD command to this many lines.  Prevents Remind from
    consuming all memory if you do something like: INCLUDECMD yes

  o $MaxLineLength - default 10485760 (10MB).  Limit the total length
    of an input line, including continuations, to this many bytes.  If
    you have a script with a line larger than 10MB, you should adjust
    this system variable and re-think your life choices.  Prevents Remind
    from consuming all memory if you do something like:

        perl -e 'print "REM foo foo foo foo" x 10000000000' | remind -

  o $MaxCachedLines - default 1000000 (1 million).  Limits the number
    of lines per file that will be cached in memory during a calendar
    run.  If a file is longer than this many lines, it will be re-read
    from disk for each run.  Prevents Remind from consuming all memory
    if you do something like:  remind -c /dev/urandom

- CHANGE: rem2ps: Print a note that rem2ps is deprecated and that
  rem2pdf should be used instead.

* VERSION 06.02.08 - 2026-07-06

- BUG FIX: remind: A regression in the previous release made Remind ignore
  the system variable $MaxLateMinutes.  This has been fixed.

- MINOR NEW FEATURE: remind: Sending a SIGHUP to a remind server process
  (remind invoked with -z0 or -zj) forces a reread of the reminder files.

- MINOR IMPROVEMENT: tkremind: Notice if the server process dies and
  restart it.  However, after three restarts, display an error and exit.

- MINOR CHANGE: remind: Use small integers for the "qid" item int JSONQUEUE
  output, rather than actual hex pointer values.  This makes remind more
  portable.

- DOCUMENTATION FIX: The default value of $MaxSatIter was incorrectly
  documented; this has been fixed.

* VERSION 06.02.07 - 2026-06-05

- IMPROVEMENT: tkremind: Make tooltip colors configurable.  Patch courtesy
  of Paolo Donadeo.

- IMPROVEMENT: remind: Allow a tdelta to cross day boundaries.  In the
  past, a reminder such as this:

      REM Tue AT 00:05 +10 *5 MSG foo

  would not be triggered at 23:55 on a Monday.  Now it will.  Similarly,
  reminders using a SCHED function to schedule queued reminders can
  cross day boundaries if the result of calling sched_func(1)
  is a sufficiently-large negative number.

- MINOR FIXES: Some man page clarifications and typo fixes.

* VERSION 06.02.06 - 2026-05-15

- NEW FEATURE: remind: Add $Repeat read-only system variable which is
  set to N if a command-line repeat of '*N' is supplied.

- NEW FEATURE: remind: You can use a command-line argument of the form
  '@trigger' to set the current date.  Remind evaluates the trigger
  and sets today() to the result.  For example, the following command
  runs Remind in Agenda Mode on the next upcoming Friday the 13th:

      remind filename.rem '@13 SATISFY [$Tw == 5]'

  and the next command runs it on 2026-11-13, the first Friday the 13th
  on or after 2026-08-01:

      remind filename.rem 2026-08-01 '@13 SATISFY [$Tw == 5]'

- MINOR CHANGE: remind: When you supply the date on the command-line,
  you can leave out the year, which defaults to the current year in
  that case.

- MINOR CHANGE: remind: When dumping variables, indicate preserved
  variables with a <preserved> tag.

- MINOR CHANGE: remind: Issue warnings if we try to FUNSET or
  PUSH-FUNCS a built-in function.

- BUG FIX: include/holidays/jewish.rem: Rearrange code to improve ICS
  export.

- BUG FIX: "make install": Remove old holidays files to avoid installation
  failure because of change in symlink setup.

* VERSION 06.02.05 - 2026-03-02

- NEW FEATURE: rem2pdf: Add --avoid-overfull option.  This makes the
  font size in a calendar box with many reminders smaller in an effort
  to fit everything neatly into the box.

- NEW FEATURE: rem2pdf: Add --entry-spacing option.  This lets you
  adjust the spacing between entries in a calendar box.  It defaults
  to one-half of the --border-size option.  NOTE: In previous
  releases, --entry-spacing defaulted to the SAME size as
  --border-size, so unless you supply an --entry-spacing value to set
  it back, the PDF calendars produced by this version of rem2pdf will
  be slightly more compact than previous versions.

- DOCUMENTATION UPDATE: Clarify rules around use of Remind source code
  for training AI models.

- FIX: include/holidays/nz.rem: Fix spelling of "Auckland" and add
  Matariki.  Fixes courtesy of Bart Joy.

* VERSION 06.02.04 - 2026-02-15

- IMPROVEMENT: remind: Add the mblower and mbupper functions, which are
  multibyte counterparts to lower and upper.

- MINOR NEW FEATURE: remind: Add the $Shaded system variable that counts
  how many times a "SPECIAL SHADE" reminder has triggered.  See the
  man page for an example of how this can be useful.

- MINOR IMPROVEMENT: Make all programs that ship with Remind (remind,
  rem2ps, rem2pdf, rem2html and tkremind) accept a --version long option.

- CHANGE: remind: Remind used to warn if the POP-OMIT-CONTEXT, POP-VARS
  or POP-FUNCS command corresponding to the relevant PUSH command was
  in a different file than the PUSH command.  But there are valid use
  cases for this, so Remind no longer emits the warning unless you use
  the "-dp" debugging flag.

* VERSION 06.02.03 - 2026-02-05

- NEW FEATURE: rem2html: Add a new --yaag option to produce a calendar
  in the "year-at-a-glance" format.  This format features a table with
  an entire month in each row.  Thanks to Robert Black for suggesting
  this and for helping out with the CSS.

- CHANGE: remind: If standard output is a TTY, then default
  $TerminalHyperlinks to 1

- CHANGE: remind: Increase the default value of $MaxSatIter from 1000
  to 10000, reflecting the higher speed of the new expression
  evaluation engine as well as the speed of modern CPUs.

- UPDATE: examples/remind.vim: Update the URL to point to maintained
  version.

- IMPROVEMENT: include/sun.rem: Add Wikipedia links for sunrise/sunset

- IMPROVEMENT: Add MOON, SHADE, WEEK, COLOR and COLOUR to the Emacs
  syntax highlighting keyword list.

- IMPROVEMENT: If an invalid value is assigned to a system variable,
  issue the error "Invalid value for system variable" rather than
  "Type mismatch"

- DOC FIX: Fix typo in man page

- BUG FIX: rem2html: Eliminate "use of uninitialized variable"
  warning.

- BUG FIX: remind: The "trigbase" JSON key in "remind -pp" output had
  an incorrectly-formatted value.  This has been fixed; thanks to
  Georg Simon for reporting this bug.

* VERSION 06.02.02 - 2026-01-10

- NEW FEATURE: remind: Turn reminders with a "Url:" INFO string into
  hyperlinks if you set the $TerminalHyperlinks system variable to 1.
  Note that your terminal must support the "OSC 8" hyperlink escape
  sequence; see
  https://gist.github.com/egmontkob/eb114294efbcd5adb1944c9f3cb5feda
  for details.

  For backward compatibility, the 'z' flag of the "-c" command-line
  option sets $TerminalHyperlinks to 1.

- NEW FEATURE: remind: Add another parameter to the "-w" option to
  remove blank lines between reminders, thereby making the calendar
  more compact.

- IMPROVEMENT: TkRemind: Make the window that pops up for background
  reminders obey the color options chosen under "Options..."

- CHANGE: remind: The header <wchar.h> and the functions mbstowcs and
  wcstombs are now mandatory.  This should not affect any vaguely modern
  UNIX system.

- IMPROVEMENT: remind: Allow Hebrew spellings of Hebrew month names.  For
  example, you can use "Iyar" or "אייר".

- IMPROVEMENT: remind: Allow different Hebrew transliterations of month names.
  For example, you can use "Shvat" or "Shevat".  See the man page for
  the full list of possibilities.

- IMPROVEMENT: remind: Add the mbpad() function, which is the
  character-oriented counterpart to pad().

- MINOR NEW FEATURE: Add a "make uninstall-script" Makefile target.  This
  generates a script that if run as root after "make install", will remove
  Remind.

- MINOR IMPROVEMENT: remind: Make COMPLETED-THROUGH a synonym for
  COMPLETE-THROUGH.

- BUG FIX: TkRemind: When we print a weekly calendar, make sure we start
  from the same date as the currently-displayed calendar.

- BUG FIX: remind: Fix an edge case where a REM command with a WARN function
  may not trigger on its actual trigger date.

- BUG FIX: include/holidays/jewish.rem: Split Chanukah into separate
  reminders to improve iCal export.

- DOC FIX: remind.1: Fix bad man page formatting.

- DOC FIX: Document that now() returns 00:00 in Calendar Mode.

* VERSION 06.02.01 - 2025-11-10

- BUG FIX: remind: Obey $ParseUntriggered in Calendar Mode.  Before,
  $ParseUntriggered was always being treated as 1 in Calendar Mode.

- BUG FIX: TkRemind: Fix some buggy interactions between the Options
  dialog and the font chooser.

- TEST FIX: One test was consistently failing under MUSL, and it is
  not clear whether MUSL's or glibc's interpretation is correct.
  Remove that test so all tests pass under MUSL.

* VERSION 06.02.00 - 2025-11-03

- MAJOR NEW FEATURE: TkRemind: A new "View..." menu lets you choose a
  calendar view from the following choices: Entire month, 1 week, 2
  weeks or 4 weeks.

- NEW FEATURE: remind: The "z" flag for the "-c" option makes Remind
  turn reminders with a "Url:" INFO string into clickable hyperlinks.
  Note that your terminal must support the escape sequences at
  https://gist.github.com/egmontkob/eb114294efbcd5adb1944c9f3cb5feda
  for this feature to work.

- IMPROVEMENT: TkRemind: The Print dialog now allows you to preview
  (and if you wish, adjust) the command used to print a calendar.

- IMPROVEMENT: TkRemind: The Agenda Mode window ("Show Today's
  Reminders") has navigation buttons for moving back or forward one
  day at a time.

- IMPROVEMENT: TkRemind: Add many keyboard shortcuts.  All pop-up
  windows can be closed with Esc or Control-W.  Other shortcuts are
  documented in the tkremind man page.

- CHANGE: TkRemind: If you hand-edit a reminder in the "Preview
  Reminder" dialog box, it is marked as non-editable by TkRemind.

- CHANGE: TkRemind: Remove support for rem2ps.  All printing is now
  done using rem2pdf.

- IMPROVEMENT: remind: Improve error reporting if there's extraneous
  content after an expression.

- IMPROVEMENT: tests: test-rem was tweaked to allow testing of an
  installed Remind installation.  This work was done by Jochen
  Sprickerhof.

- IMPROVEMENT: rem2pdf: When rendering weekly calendars, reduce the
  default size when drawing moons; if a day does not have a moon
  indicator, don't leave a big gap before the first reminder entry.

- IMPROVEMENT: rem2pdf: Draw moon phases left-aligned.

- IMPROVEMENT: rem2pdf: For weekly calendars with 4 weeks per page,
  make all of the boxes the same height.

- DOCUMENTATION IMPROVEMENT: remind: Document the INFO strings that
  back-ends should strive to support (Url:, Location: and
  Description:)

- BUG FIX: TkRemind: Bind the Home/End/PgUp/PgDn keys on the numeric
  keyboard for navigation.

- FIX: Don't enable -ffat-lto-objects on FreeBSD.

- BUG FIX: remind: Don't segfault if we can't open a .purged output
  file in purge mode.

- BUG FIX: rem2pdf: Make PANGO @x,y positioning consistent between
  weekly and monthly calendars.  NOTE: If you use absolute PANGO
  positioning, you might need to adjust your script because positions
  are now relative to the centers of the grid lines.

* VERSION 06.01.08 - 2025-10-27

- BUG FIXES: tkremind: Fix many bugs with modal dialogs: Clicking too fast
  to launch them could cause error messages; closing them with the window
  manager "close" button rather than "Cancel" could cause errors.  Thanks
  to Tug Williams for finding these bugs.

- MINOR NEW FEATURE: tkremind: The "Print" dialog has a "Show Command"
  button that lets you cut-and-paste the command tkremind would have used
  for printing.  You can then customize it as you like.

- MINOR FIXES: remind: A few silly errors in the man page were fixed.

* VERSION 06.01.07 - 2025-10-23

- IMPROVEMENT: tkremind: Add a "help" button that pops up the TkRemind man
  page (and offers a browser for all the remind-related man pages.)

- MINOR IMPROVEMENT: rem2pdf: Leave less whitespace between the day number and
  the entries in a calendar box.

- MINOR IMPROVEMENT: make test: If hunspell is installed, check the spelling
  of *all* man pages.  Previously, some were being missed.

- DOCUMENTATION IMPROVEMENT: WHATSNEW: Make the version numbers in this file
  exactly match the ones reported by "remind --version".  That is, we say
  "06.01.07" instead of "Version 6.1 Patch 7".

* VERSION 06.01.06 - 2025-10-20

- NEW FEATURE: rem2pdf: Add command-line options to set colors of various
  parts of the calendar such as the gridlines, the day numbers, etc.

- NEW FEATURE: rem2pdf: Add a command-line option to make the calendar title
  into a hotlink to a URL that you supply.

- IMPROVEMENT: remind: Make the tzconvert() function warn about possibly
  invalid time zone names, similar to the warning issued by the TZ keyword.

- IMPROVEMENT: "make test": If spellintian and hunspell are installed,
  use them to spell-check and lint the man pages and README.md file.

- PORTABILITY IMPROVEMENT: Make Remind compile on OpenIndiana (a
  Solaris derivative.)  "make test" fails because of deficiencies in
  the Solaris C library, however.

- MINOR FIXES: Fix various spelling errors caught by hunspell.

- BUG FIX: rem2pdf: Correct a bug in the coordinate-tracking of calendar boxes
  so that SHADE fills the entire box and absolutely-positioned PANGO items
  are positioned correctly.

- MINOR BUG FIX: remind: Suppress spurious debugging output when using
  "-dt" flag with a TZ clause.

- MINOR BUG FIX: remind: For the purposes of purge mode, don't consider a
  non-constant expression in the *body* of a reminder to be a problem.

- MINOR BUG FIX: remind: Fix a couple of (unlikely-to-be-triggered) memory
  leaks.

- MINOR BUG FIX: include/holidays/jewish.rem: Don't leak private
  functions and variables to the calling file.

* VERSION 06.01.05 - 2025-10-09

- BUG FIX: remind: Yet another bug in TZ handling was fixed.  I hope this
  is the final TZ bug; the test suite has had a large number of TZ tests
  added.

- IMPROVEMENT: remind: If the directory /usr/share/zoneinfo exists, Remind
  warns about time zone names that look invalid.  You can override the
  warning by prefixing your time zone name with "!" if you want to use
  non-file-based time zone names like "UTC+0400".

- MINOR IMPROVEMENTS: A couple of man page typos were fixed.

* VERSION 06.01.04 - 2025-10-08

- BUG FIX: remind: In calendar mode, reminders that specify a TZ zone
  that is *behind* the system time zone could sometimes not show up.
  The bug has been fixed; thanks to Jin Chen for reporting it.

- CHANGE: remind: Any time Remind runs another program (for example,
  in response to REM ... RUN, the shell() command, the -k option, or
  INCLUDECMD) it connects that command's standard input to /dev/null
  so that it cannot interfere with the main Remind process's standard
  input.

- BUG FIX: remind: Don't set up an inotify file descriptor if we are
  not running in Daemon Mode.

- MINOR IMPROVEMENT: remind: When using readline to read from a
  terminal, include the line number in the Remind> prompt.

- IMPROVEMENT: lang/*.rem: Suppress redefined function warnings if you
  include one language file and then later on a different one.

- IMPROVEMENT: remind: Make the output of "make test" slightly more
  verbose; color-code the PASS and FAIL results if standard output
  refers to a terminal.

- CHANGE: include/holidays/*.rem: Add %"..%" markers and %! %b
  suffixes to all reminders.  This prevents you from having to use the
  msgsuffix() hack if you want advance warning of holidays.

  If you *are* using the msgsuffix() hack, you should stop using it!
  Just set $DefaultDelta.  See include/holidays/README for details.

* VERSION 06.01.03 - 2025-09-30

- IMPROVEMENT: remind: Issue a warning that SCANFROM should be used
  with ADDOMIT in cases where Remind detects a movable OMIT.

- NEW FEATURE: remind: Add $WarningLevel system variable.  This lets
  you suppress warnings added by new versions of Remind until you have
  a chance to update your remind scripts.

- BUG FIX / IMPROVEMENT: include/holidays/*.rem: Simplify the logic
  used for moving holidays before/after weekends.  Also fixes bugs
  found in the logic used to move New Year's Day.  Thanks to Nimrod
  Levy for pointing out the New Year's Day bug.

- IMPROVEMENT: include/holidays/jewish.rem: This file was reworked by
  Nimrod Levy to simplify logic and optionally add the counting of the
  Omer.

- BUG FIX: remind: "remind -c" would add an unnecessary blank line for
  completely-empty calendar rows if you used the "-w,0,0" option.
  This is now fixed.  Bug pointed out by Tim Chase.

* VERSION 06.01.02 - 2025-09-19

- BUG FIX: remind: A reminder on a specific fixed date and time that
  uses the TZ feature could erroneously issue a "Can't compute trigger"
  error.  This has been fixed.

- CHANGE: remind: The default for --max-expr-complexity is 10,000,000
  (ten million) instead of unlimited.  This should not affect any
  real-world Remind scripts.

* VERSION 06.01.01 - 2025-09-12

- NEW FEATURE: remind: Add the new --max-expr-complexity=n
  command-line argument.  It is possible to write expressions that use
  enormous amounts of CPU time, such as the following:

          FSET fib(n) iif(n <= 2, 1, fib(n-1)+fib(n-2))
          SET a fib(100)

  That will take essentially forever to execute, but will not hit the
  built-in recursion limit.  Using a command-line argument of
  --max-expr-complexity=1000000 will terminate evaluation in a few
  dozen milliseconds on modern hardware, and should not affect
  realistic reminder scripts.  See the man page for details.

- IMPROVEMENT: remind: Add UTF-8-aware functions to complement the
  byte-aware functions that could give incorrect results by splitting
  a UTF-8 character sequence.  The correspondence between old and new
  functions is:

     NON-UTF-8-AWARE   UTF-8-AWARE
     ===============   ===========
     strlen            mbstrlen
     substr            mbsubstr
     index             mbindex
     char              mbchar
     asc               codepoint

  See the remind(1) man page for details.

- MINOR NEW FEATURE: remind: You can use hexadecimal integer constants
  like 0xFE12 in expressions.  This is mostly useful for using
  mbchar() since Unicode code points are often expressed in
  hexadecimal.

- BUG FIX: remind: When truncating a string when executing DUMPVARS or
  during debugging of expression evaluation, Remind could sometimes
  cut the string in the middle of a UTF-8 sequence.  This has been
  fixed.

* VERSION 06.01.00 - 2025-09-08

- MAJOR NEW FEATURE: remind: The TZ keyword lets you specify a time
  zone for a REM command.  All trigger calculations are performed in
  the named time zone.

- DOCUMENTATION: Update README.md to document prerequisites for readline
  support.

- DOCUMENTATION: remind.1: Document system variables such as $T that can
  have multiple types.

- BUG FIX: remind: If Remind was run interactively ("remind -c -" with
  readline support enabled) it would not properly cache the input
  file, but would keep asking for interactive input.  This has been
  fixed.

* VERSION 06.00.02 - 2025-09-01

- CHANGE: Default $ParseUntriggered to 0 instead of 1.  The default
  could cause spurious warnings such as "type mismatch" warnings for
  untriggered reminders.

- TEST FIX: Explicitly set latitude and longitude in test files.

- BUG FIX: remind: Don't add lines to "readline" history unless they
  are actually being read from standard input.

- BUG FIX: remind: On the command-line, make '-i$foo' behave the same
  way as '-i$foo=0' as was documented in the man page.

- BUG FIX: remind: Clamp the output of trigger() to "1 January 1990 AT
  00:00" if the UTC flag is used, even if it would actually produce a
  result in 1989.

- MINOR FIX: remind: Avoid "unused result" compiler warning.

* VERSION 06.00.01 - 2025-08-19

- NEW FEATURE: remind: Add readline support if input is taken from stdin
  (ie, "remind -").  This gives you full editing support if you run
  Remind interactively.

- BUG FIX: remind: Fix buffer overflow in DUMPVARS command.
  Thanks to Jochen Sprickerhof for helping me find this bug.

* VERSION 06.00.00 - 2025-08-18

- MAJOR NEW FEATURE: remind: Introduction of TODOs.  These are similar
  to normal reminders, but (in Agenda Mode) you keep getting reminded
  of them even once they are in the past, unless you specifically mark
  them as completed.

- MAJOR NEW FEATURE: remind: The --json long option causes Remind to
  output JSON in Agenda Mode instead of the normal text output.  See
  tkremind for an example of how a front-end can use this output.

- MINOR NEW FEATURE: remind: The RETURN statement can be used to skip
  the rest of the current file.  Useful for early exit from an
  INCLUDEd file.

- MINOR NEW FEATURE: remind: Allow the %:, %!, %?, %@ and %#
  substitution sequences to be overridden by defining the functions
  subst_colon, subst_bang, subst_question, subst_at and subst_hash,
  respectively.

- SAFETY IMPROVEMENT: remind: If a function is defined in a context
  where RUN is disabled, disable RUN during the evaluation of the
  function.  Also disable RUN for all subst_XXX callbacks and the
  ordx(n) callback.

- MAJOR IMPROVEMENTS: tkremind: TkRemind has been given an overhaul.
  The "Show Queue" and "Show Today's Reminders" windows now respect
  the color scheme.  TkRemind lets you create TODO reminders and
  easily mark them completed.  You can right-click on a day number
  to get a window with Agenda Mode reminders for that day.

- MINOR IMPROVEMENT: remind: Language packs can define an ordx(n)
  function that localizes ord(n).  If this function is defined, then
  ord(n) automatically calls it rather than using its built-in English
  localization.  Appropriate ordx(n) definitions have been added to
  all language packs.

- MINOR IMPROVEMENT: remind: The %b substitution sequence handles
  dates in the past (because of TODOs).  The %! sequence considers
  both date and time, and can be used with non-timed reminders.  The
  new %? sequence is similar to %!, but outputs "are" and "were"
  instead of "is" and "was".  The new %*! and %*? sequences are
  similar to %! and %?, but compare the trigger date to realtoday()
  instead of to today().

- MINOR IMPROVEMENT: remind: Downgrade a SPECIAL COLOR... with
  out-of-range color values to a normal MSG-type reminder.

- MINOR IMPROVEMENT: include/lang/nl.rem: Use "eergisteren" for "2
  days ago" and "overmorgen" for "in 2 days' time."

- MINOR IMPROVEMENT: tkremind: TkRemind now passes all command-line
  options back to Remind.

- TEST IMPROVEMENT: remind: Add --flush option and use it in tests to
  have more predictable interleaving of stdout/stderr output.

- BUG FIX: tkremind: In a couple of places, the "eval" command was used
  where the intention was to use "catch".  I blame Perl...

- BUG FIX: remind: SCANFROM and FROM are separated out internally, and
  in the JSON output, the original FROM or SCANFROM value is
  preserved, including relative SCANFROMs.

- BUG FIX: tkremind: Remove some extraneous semicolons.

- DOCUMENTATION FIX: Fix some man-page format directive errors;
  tweak wording in several pages.

* VERSION 05.05.00 - 2025-07-28

- NEW FEATURE: remind:  Add the PUSH-VARS / POP-VARS commands and the
  analogous PUSH-FUNCS / POP-FUNCS commands.  These let you localize
  changes to variables and functions and help with writing more modular
  reminder files.

- INTERNAL CHANGES: Clean up the code following recommendations from
  an updated "cppcheck" executable.

* VERSION 05.04.02 - 2025-07-16

- MINOR CHANGE: remind: Allow daysinmon() to take a DATE or DATETIME
  argument.

- MINOR CHANGE: remind: All functions that want an integer month number
  will now also accept a string naming the month.

- UPDATE: include/holidays/chinese-new-year.rem: Add dates for Chinese
  New Year for 2051 through 2100.

- BUG FIX: remind: Set trigdate() correctly for a fully-specified
  date, even if it's in the past, as the manual documented.  Bug
  found by Tim Chase.

- DOCUMENTATION FIX: rem2html: Document the correct Perl module
  prerequisites.

- CODE FIXES: remind: Various minor improvements to the code with
  no user-visible changes.

* VERSION 05.04.01 - 2025-06-15

- MAJOR BUG FIX: remind: In some circumstances, a REM command could
  yield a trigger date after its UNTIL date, rather than recognizing it
  as having expired.  This has been fixed.  Bug found by Ian! D. Allen.

- BUG FIX: rem2pdf: Support the COLOUR special (as well as COLOR).

- MINOR IMPROVEMENT: Add include/utils/add-html-anchors.rem.  You can
  INCLUDE this file to get HTML anchors added to every calendar day
  by rem2html.

- DOCUMENTATION: Add NOTE-ABOUT-AI.txt

* VERSION 05.04.00 - 2025-06-03

- MAJOR IMPROVEMENT: remind: Track which expressions and variables
  Remind can prove to its satisfaction are "constant" - that is, that
  will always have the same value on any Remind run as long as the
  files are not edited.  This allows "Purge Mode" to purge more
  reminders than before.

  See the new remind(1) man page section "NON-CONSTANT EXPRESSIONS"

- MINOR NEW FEATURE: remind: add the "nonconst" built-in function (to
  force an expression to be interpreted as non-constant), the "const"
  function to force an expression to be interpreted as constant, and
  the "isconst" function to test if an expression is constant.

- MINOR NEW FEATURE: remind: Add eval() built-in function that takes a
  string argument and evaluates it as an expression.  For safety, the
  "shell" function is disabled inside an eval().

- MINOR NEW FEATURE: remind: add the "u" debugging flag to warn you if
  you set a variable that is not subsequently used.

- MINOR NEW FEATURE: remind: Add the trigbase() function and
  corresponding $Tb system variable.  See the remind(1) man page for
  details.

- MINOR IMPROVEMENT: remind: make value("var", default) evaluate the
  second argument lazily: If "var" is defined, then the second
  argument is never evaluated.

- MINOR IMPROVEMENT: remind: Add syntax for redefining a function without
  issuing a warning.  The syntax:

      FSET - func(x) expr

  is equivalent to:

      FUNSET func
      FSET func(x) expr

- MINOR IMPROVEMENT: include/holidays: Update a bunch of files to use
  isany(n, a, b, c) rather than (n == a || n == b || n == c)

- MINOR IMPROVEMENT: remind: Make $Tu a synonym for triguntil().

- MINOR IMPROVEMENT: remind: If coerce() fails, issue a more detailed
  error message.

- MINOR IMPROVEMENT: remind: Using Hush mode "-h" with purge mode "-j"
  suppresses the normal purge-mode diagnostics about reminders that
  might not be purged.  Instead, only the "#!P: Expired" purge-mode
  lines are emitted.

- NEW FEATURE: remind: Add the catch() built-in function.  This lets
  you catch errors in expression evaluation.  For example:
  catch(2/0, "oops") returns "oops".  The catcherr() function returns
  the error message from the last catch() expression that failed, in
  this case "Division by zero".

- IMPROVEMENT: remind: Remind can handle dates that require UTC to
  Local conversion (and vice-versa) for years greater than 2038, even
  on systems with a 32-bit time_t.

- MINOR IMPROVEMENT: remind: Allow the argument to monnum() to be a
  string, in which case it's parsed as a month name and the
  corresponding month number returned.

- MINOR IMPROVEMENT: remind: Allow the argument to wkdaynum() to be a
  string, in which case it's parsed as a weekday name and the
  corresponding weekday number returned.

- MINOR IMPROVEMENT: remind: Make the expression parser optimize away
  the unary "-" and "!" operators when followed by an integer constant.

- BUG FIX: tests: Don't use the obsolete "tail +2" syntax in test-rem.
  Fix courtesy of Dick Marinus.

* VERSION 05.03.07 - 2025-05-06

- IMPROVEMENT: examples/astro: Make moonrise/moonset appear after
  sunrise/sunset

- NEW FILES: Add include/solar-eclipses.rem and
  include/lunar-eclipses.rem for solar and lunar eclipses
  (respectively) in the 21st century.

- NEW SYSTEM VARIABLE: remind: Add $TimetIs64bit system variable,
  which is 1 if the built in time_t type is at least 64 bits, and 0
  otherwise.

- TEST FIX: "make test" now passes on systems with a 32-bit time_t
  type.

- BUG FIX: include/holidays/nl.rem: Use the correct rules for
  Koningsdag and Bevrijdingsdag, courtesy of Adrian P. van Bloois.

* VERSION 05.03.06 - 2025-04-25

- BUG FIX: remind: Make "remind -s" respect $DefaultColor.  Bug found by
  Tim Chase.

- DOCUMENTATION IMPROVEMENT: Make documentation of $SuppressLRM a bit more
  prominent

- UPDATE: contrib/remind-conf-mode: Add new functions moonrise, moonset, etc.
  to Emacs highlighting file

- MINOR IMPROVEMENT: examples/astro: Align output better

- MINOR FIX: src/moon.c: Change C++-style comments to C-style comments

* VERSION 05.03.05 - 2025-03-23

- NEW FEATURE: remind: Add moonrise, moonset, moonrisedir and moonsetdir
  functions.  The first two functions calculate the time of the next
  moonrise and moonset, and the second two calculate in which direction
  the moon will rise or set.  See the examples/astro script for examples
  of how to use the moonrise/moonset functions.

- CODE CLEANUPS: remind: Some minor code cleanups with no user-visible effects.

- IMPROVEMENT: Add tests for the astronomical calculation functions.

- UPDATE: Update the included json.c and json.h files to the latest versions
  from https://github.com/udp/json-parser

- BUG FIX: remind: The %2 and %@ sequences would print "0:34am" for the
  time 00:34, instead of the correct "12:34am".  This has been fixed.

- BUG FIX: TkRemind: Fix bug that broke the ability to open a text editor
  on a reminder from the "Queue..." listing.

* VERSION 05.03.04 - 2025-03-09

- BUG FIX: remind: "make test" could fail if Remind was built in a locale
  other than "C".  This has been fixed.

- BUG FIX: Fix a typo in the remind man page.

* VERSION 05.03.03 - 2025-03-03

- NEW FEATURE: remind: If a command spans more than one line (because of
  backslash line continuation) output both the starting and ending line
  number in error messages.

- NEW FEATURE: remind: In the JSON -pp and -ppp output, include a new key
  lineno_start to specify the starting line of a multi-line reminder.
  The existing lineno key specifies the ending line; this is maintained
  for backward-compatibility.

- MINOR IMPROVEMENT: include/holidays/misc.rem: Add a few new holidays and
  URL INFO strings.

- CHANGE: remind: Issue a warning if a time-related substitution sequence
  is used with a non-timed REM command.

- BUG FIX: remind: Fix a memory leak.

* VERSION 05.03.02 - 2025-02-09

- CHANGE: remind: Revert a change to the way "-y" tags are generated that
  was introduced in 05.03.01.  The change broke a library that depended
  on it being generated in the old way.

* VERSION 05.03.01 - 2025-02-07

- IMPROVEMENT: TkRemind: When we pop up a timed reminder, make any "Url:"
  info string into a clickable link.

- IMPROVEMENT: rem2pdf: Improve the layout of the small monthly calendars.

- BUG FIX: rem2pdf: Add checks for all Perl dependencies.

* VERSION 05.03.00 - 2025-02-04

- NEW FEATURE: remind: Add the "INFO" clause to the REM command.  This
  is intended for storing additional metadata about an event, such as
  the location and a longer description.  The intention is to make
  Remind <-> iCal conversions preserve as much information as possible.

- NEW FEATURE: rem2html, rem2pdf, tkremind: Add support for the "Url:"
  info string that turns reminders into hyper-links.  For example,
  consider this reminder:

      REM 15 INFO "Url: https://foo.example" MSG Foo

  The text "Foo" will be made into a link to "https://foo.example"
  by rem2html and rem2pdf.  If you middle-click it in tkremind, it
  will open the URL.

- NEW FEATURE: remind: Add the triginfo() built-in function so a reminder
  body can refer to INFO data.  Add the %<...> substitution filter as a
  shorthand for [triginfo("...")]

- NEW FEATURE: TkRemind: Add "Location" and "Description" fields when
  creating a reminder; these are converted to INFO clauses.  Also support
  a popup window with the extra information when hovering over a reminder
  in the calendar display.

- IMPROVEMENT: Update the reminder files included with Remind to add
  INFO strings with Wikipedia URLs for various holidays and
  astronomical events.

- IMPROVEMENT: remind: Add the "\xAB" escape sequence for parsing quoted
  strings, where "AB" is a pair of hex digits.

- NEW FUNCTION: remind: Add the escape() built-in function that converts
  problematic characters within a string to the \-escaped versions.
  It's essentially the inverse of how Remind parses a quoted string.

* VERSION 05.02.03 - 2025-01-22

- NEW FEATURE: remind: Add "TRANSLATE GENERATE" command for generating
  a skeleton set of TRANSLATE commands to make it easier to localize
  Remind.

- NEW FEATURE: remind: Add "q" debug flag for tracing calls to _()
  or %(...) in the substitution filter; this will help with localizing
  reminder files.

- NEW FILES: remind: Add holidays/lgbtq.rem for LGBTQ holidays.  Add
  country-specific files in holidays/lgbtq/*.rem

- IMPROVEMENT: TkRemind: use "info patchlevel" to display full Tcl/Tk
  version.

- IMPROVEMENT: remind: The DEBUG command issues a warning if given an
  unknown debug flag.

- BUG FIX: remind: "make test" will now succeed even if run between
  23:55 and 00:00 UTC.  This is done with a new --test flag for remind.

- BUG FIX: remind: Avoid potential buffer overflow if someone supplies
  ridiculously-long translations for "am" or "pm".

* VERSION 05.02.02 - 2025-01-06

- NEW FEATURE: remind: The "-p+" option lets you produce weekly calendars;
  so far, the rem2pdf and rem2html back-ends support rendering of weekly
  calendars.

- NEW FEATURE: remind: The $CalType system variable indicates the type of
  calendar being produced; its value is one of "monthly", "weekly",
  or "none".  "none" signifies agenda mode rather than calendar mode.

- IMPROVEMENT: remind: Warn if a POP-OMIT-CONTEXT matches a
  PUSH-OMIT-CONTEXT that is in a different file.

- CHANGE: remind: Split the "-ds" debug option into two separate options:
  "-ds" for debugging expression-parsing and "-dh" for printing hash
  table statistics on exit.

* VERSION 05.02.01 - 2024-12-16

- BUG FIX: remind: Fix a logic error that only showed itself on big-endian
  architectures.  Found thanks to Debian testing and a notification from
  Jochen Sprickerhof.

* VERSION 05.02.00 - 2024-12-16

- MAJOR NEW FEATURE: remind: Add the TRANSLATE command, the _()
  built-in function and the %(...) substitution sequence.  These allow
  you to localize your reminder files more easily.  The translation table
  is also made available to back-ends like rem2pdf and tkremind,
  which they can use as they see fit.

- MINOR FEATURE: tkremind, rem2html: Localize the names of the moon
  phases.

- MAJOR CHANGE: remind: Remind used to support compile-time localization
  into different languages (French, English, etc.)  That compile-time
  support has been removed and all localization is now done at run-time.

- NEW FEATURE: remind: In JSON daemon mode (-zj), the front-end can
  request translation table entries from the Remind daemon, allowing the
  front-end to localize messages.

- UPDATE: Update national holidays following update to upstream Python
  library.

- MINOR FEATURE: Add standard include/sun.rem file for sunrise/sunset.

- MINOR FEATURE:  The SYSINCLUDE command has been added.  The command:

      SYSINCLUDE foo/bar.rem

  is equivalent to:

      INCLUDE [$SysInclude]/foo/bar.rem

- MINOR IMPROVEMENT: Allow INCLUDE, DO and SYSINCLUDE to include files with
  spaces in their names; in this case, you have to put the filename inside
  double-quotes.

- IMPROVEMENT: remind: Refuse to open subdirectories named "*.rem"
  under a top-level directory rather than trying and failing with a
  confusing error.

- IMPROVEMENT: contrib/remind-conf-mode: Fix a few bugs and choose colors
  that are easier on the eyes.

- IMPROVEMENT: remind: Remind used to have three completely separate
  hash table implementations.  They have all been replaced with a single
  implementation; this new implementation adapts the hash table size based
  on the number of entries and is dramatically faster than the old code
  when there are a large number of entries.

- MINOR FIXES: remind: Fix typos in comments; use memcpy to copy OMIT
  contexts internally.

- BUG FIX: remind: Actually allow the documented 9 levels of INCLUDE
  rather than 8.

- BUG FIX: remind: If an INCLUDE statement failed inside an IF statement,
  Remind would print spurious errors about unmatched IF/ENDIF.  This has
  been fixed.

* VERSION 05.01.01 - 2024-11-18

- BUG FIX: Fix a bug in test-rem that could have caused test failures.
  Fix courtesy of Jochen Sprickerhof.

* VERSION 05.01.00 - 2024-11-18

- MAJOR IMPROVEMENT: Include holiday files for many countries and
  regions, courtesy of the Python "holidays" project:
  https://pypi.org/project/holidays/  See include/holidays/README
  for usage instructions and important caveats

- NEW FEATURE: remind: Added the $DedupeReminders system variable; see
  its documentation in the remind man page for details.

- NEW FEATURE: remind: Added the FRENAME command to rename a user-defined
  function.  See its documentation in the remind man page for use-cases.

- NEW FEATURE: remind: Added the $DefaultDelta system variable that
  specifies a default (date) delta for reminders that lack one.  It is
  analogous to the default time delta system variable $DefaultTDelta.

- IMPROVEMENT: remind: Added a way for the output of msgsuffix() to appear
  on the same line as a reminder rather than on the next line.  See the
  remind man page for details.

- UPDATE: contrib/ical2rem: Update to upstream version 0.8

- DOCUMENTATION FIXES: Many updates and clarifications to the man pages.

- BUG FIX: Fixed configure.ac so that autoreconf works.

* VERSION 05.00.07 - 2024-10-16

- NEW FEATURE: tkremind: Add option to create a desktop notification when
  a queued reminder is triggered.  For Tcl/Tk 9.0 or later, uses the native
  "tk sysnotify" facility.  For earlier versions of Tcl/Tk, executes the
  "notify-send" program if possible.

- NEW FEATURE: remind: Add --print-config-cmd option which prints the
  exact ./configure command used to build Remind.  This will let you
  configure future Remind releases exactly the same way an installed
  version was configured.

- UPDATE: include/holidays/ca.rem: Add National Day for Truth and
  Reconciliation to Canadian holiday list.

- MINOR IMPROVEMENTS: Update examples/ansitext and examples/astro

- MINOR IMPROVEMENT: remind: Use HashPJW to hash variable and function
  names; make the hash table size a prime rather than a power of two.
  This seems to improve hash performance ever so slightly in most cases.

- UPDATE: Update contrib/ical2rem to upstream version 0.7.1

- FIX: tkremind: Make tkremind work with Tcl/Tk 8.5 or higher, including
  Tcl/Tk 9.0

- MINOR CHANGE: remind: Add hash table statistics to "-ds" debugging
  output.  This is probably of no use to anyone except the author of
  Remind.

* VERSION 05.00.06 - 2024-09-16

- NEW FEATURE: remind: Include a file containing the dates of Chinese
  New Year through 2050.

- NEW FEATURE: remind: Add $SuppressImplicitWarnings system variable.
  Setting this to 1 suppresses the warnings "Unrecognized command;
  interpreting as REM" and "Missing REM type; assuming MSG"

- NEW FEATURE: remind: Add --print-tokens command-line argument.  This
  simply prints all of Remind's built-in tokens, functions, and system
  variables.  It's designed to help people who are writing editor
  add-ons for syntax highlighting.

- CHANGE: remind: allow '12:34' to be parsed as a TIME constant.  This
  matches DATEs and DATETIMEs which are enclosed in single-quotes.
  (The quotes are optional for TIME constants, however.)

- IMPROVEMENT: Improve many error messages and warnings.

- UPDATE: contrib/ical2rem: Update to upstream version 0.7

- IMPROVEMENT: contrib/remind-conf-mode: Improve the Emacs
  remind-conf-mode package.  Add new keywords and make comment
  highlighting correct.

- FIX: remind man page: Remove note saying REM can be omitted.

* VERSION 05.00.05 - 2024-09-02

- CHANGE: remind: When using the "-c" option and with the SHADE special
  enabled, shade the entire calendar box including the line containing the
  day number.

- IMPROVEMENT: remind: Better error messages when diagnosing certain
  errors in expressions.

- IMPROVEMENT: include/holidays/jewish.rem: Remove unnecessary _h()
  function definition.

- BUG FIX: remind: In a couple of spots when we parsed a character, we did
  not check for an error return.  This has been fixed.

- BUG FIX: remind: Fix edge-case bugs in "remind -c" output formatting.

- BUG FIX: make test: Fix a test that was broken for all of September 2024.

- BUG FIX: remind: Fix a couple of potential file-descriptor leaks.

- BUG FIX: contrib/ical2rem.pl: Replace "SCHED _sfun" with "+15" to
  hard-code 15-minutes advance warning rather than using an undefined
  scheduling function.  If this is not what you want, you should edit
  ical2rem.pl to suit your taste; it's not officially part of Remind and
  is meant more as a starting point for you to customize than a finished
  product.

- DOCUMENTATION FIX: Remove obsolete info from Remind man page.

* VERSION 05.00.04 - 2024-08-29

- IMPROVEMENT: remind: When checking if a SATISFY expression refers to the
  trigger date, look recursively at any user-defined functions it calls.
  This reduces spurious warnings.

- CHANGE: remind: Allow any type to be used as the test argument for IIF.

- IMPROVEMENT: remind man page: Clarify how various types are treated
  in boolean context.

* VERSION 05.00.03 - 2024-08-28

- IMPROVEMENT: remind: Preserve newlines ("%_" sequences) in calendar
  mode in most cases.  See the remind man page for details.

- IMPROVEMENT: rem2pdf: rem2pdf can now produce PostScript and
  Encapsulated PostScript output in addition to PDF and SVG.

- IMPROVEMENT: remind: Emit warnings if a subst_XXX function takes the
  wrong number of arguments, or for custom sequences, if the function
  is not defined.

- IMPROVEMENT: remind: Emit warnings if WARN/SCHED/OMITFUNC functions
  do not reference their argument.

- IMPROVEMENT: remind: Allow strings to be used with logical
  operators.  The empty string "" is considered false and all other
  strings are considered true.

- IMPROVEMENT: remind: Emit warnings for lines that are implicitly
  treated as REM commands; add warnings for REM commands that are
  implicitly treated as MSG-type reminders.

- IMPROVEMENT: remind: Add an optional fourth argument to the built-in
  ampm() function that specifies not to suppress a leading zero in the
  hour component.

- IMPROVEMENT: remind: If a SATISFY expression is not constant and
  doesn't reference the trigger date somehow, issue a warning.

- IMPROVEMENT: remind: Add a warning if a user-defined function is
  redefined.  If you do have a use-case that requires you to redefine
  a function, simply FUNSET it first before FSETting it for the second
  time.

- DOCUMENTATION FIX: Clarify man pages and remove some information that
  has become incorrect as Remind has evolved.

- BUG FIX: Fix typos in man pages

* VERSION 05.00.02 - 2024-07-26

- IMPROVEMENT: Remind: Revamp how ONCE works.  You can now set a
  special variable $OnceFile to be the path to a timestamp file.  The
  ONCE directive uses this timestamp file to track when it was last
  run rather than the access date of the main reminder script.  This
  is more reliable because it doesn't rely on the atime of a file
  (which might not be maintained accurately) and is not affected if
  you edit your reminder script.

- CHANGE: Taking input from stdin no longer implies the "-o" option; ONCE can
  work if you set $OnceFile

- CHANGE: Any of the -c, -n, -p and -s options implicitly enable the
  -o option.  As before, specifying a repeat factor *N or a date that
  is not today on the command-line also implies -o.

- MINOR NEW FEATURE: Rem2PDF: Add the "--svg" command-line option to produce
  SVG output rather than PDF.

- MINOR IMPROVEMENT: Remind: Improve the storage efficiency of short
  string constants in compiled expression trees.

- MINOR IMPROVEMENT: Remind: Remove some obsolete macro definitions

* VERSION 05.00.01 - 2024-06-08

- MINOR IMPROVEMENT: Add short-circuit evaluation to the isany() function,
  which now only evaluates those arguments absolutely necessary to determine
  the result.

- BUG FIX: Mark weekno() as a non-constant function (the zero-argument form
  depends on external conditions.)

- BUG FIX: Fix a couple of memory leaks.

- BUG FIX: Don't rely on support for unnamed function parameters; this caused
  compilation failures with older versions of gcc.

* VERSION 05.00.00 - 2024-06-06

- MAJOR CHANGE: The expression evaluation engine has been completely replaced
  with a new one that splits parsing and evaluating into two separate steps.
  It also features short-circuit evaluation of &&, ||, iif() and choose().
  This should speed up expression-heavy reminder files.

  NOTE INCOMPATIBILITY: In expressions with side-effects, the short-circuit
  evaluation might change the result you get.  For example, consider
  running the following file through: remind file.rem 2024-06-04

    SET a trig("Mon +7") || trig("Thu +7")
    MSG trig = [trig()]

  Older Remind versions will output:

    trig = 2024-06-06

  whereas this version outputs:

    trig = 2024-06-10

  because the second part of the "||" expression is not evaluated.  The vast
  majority of Remind expressions do not have side-effects and should yield
  the same results as before.

  The newer expression engine also permits recursive functions, but
  these are not recommended.  Still, if you want to, you can do:

    fset factorial(n) iif(n <= 1, 1, n*factorial(n-1))

  and it will work for values of n that don't cause integer overflow.

- IMPROVEMENT: If there's an unmatched PUSH-OMIT-CONTEXT, print the
  filename and line number containing it.

- IMPROVEMENT: If there's an IF with a missing ENDIF, print the filename
  and line number of the IF statement.

- NEW FEATURE: Add EXPR OFF command to completely disable expression
  evaluation.  Useful if you INCLUDE files that you don't expect to
  contain expressions and may come from slightly untrustworthy sources.

- NEW FEATURE: Add $ExpressionTimeLimit system variable to enforce a
  maximum limit on how long evaluating an expression is allowed to take.

- NEW FEATURE: Add --max-execution-time=n command-line option to terminate
  Remind if it runs for more than n seconds.

- CHANGE: Make the command-line option "-ifoo" equivalent to "-ifoo=0"

- CHANGE: Permit a literal [ in a reminder by using the sequence [[
  The old ["["] still works.

- BUG FIX: In "purge" mode, Remind would sometimes purge reminders with
  a relative "SCANFROM" which haven't actually expired.  This has been fixed.

- BUG FIX: Disallow something like: FSET func(x, x) expr
  which shouldn't have been allowed in the first place.

- BUG FIX: Replace leading spaces with tabs in Makefiles (per Emanuele Torre
  and Tim Chase)

* VERSION 04.03.07 - 2024-04-29

- IMPROVEMENT: build.tk: Add a note if build.tk obtains default settings
  from an existing Remind installation.

- IMPROVEMENT: configure: Pass all args to AC_INIT including the Remind
  home page.  Remove some unused autoconf cruft.

- IMPROVEMENT: Use standard C library versions of strdup, strcasecmp and
  strncasecmp where available, rather than using our own versions.

- MINOR FEATURE: remind: Make $Tt a synonym for trigtime().

- BUG FIX: remind: Make sure shellescape() doesn't mangle UTF-8 characters
  with high-bits set.

- BUG FIX: remind: Don't rely on undefined behavior of "%" operator in
  the ord() built-in function.

- BUG FIX: remind: Do not clear out trigtime() unnecessarily.  Before,
  you could not write things like the following; now you can:

      REM Tue AT 11:30 DURATION 0:30 MSG Thing 1
      REM Tue AT [trigtime()+trigduration()] DURATION 1:00 MSG Thing 2
      REM Tue AT [trigtime()+trigduration()] DURATION 0:45 MSG Thing 3

  for successive reminders that should be moved as a block if the time of
  the first one changes.

- BUG FIX: Don't update trigdate() or trigtime() while parsing a REM
  statement... only when actually computing the trigger.

* VERSION 04.03.06 - 2024-04-02

- NEW FILE: Add [$SysInclude]/holidays/pt.rem - Portuguese holidays, courtesy
  of Joop Kiefte.

- BUG FIX: remind: Fix compile error on systems that don't support inotify(7).

- BUG FIX: remind: Fix test failures on FreeBSD.  On FreeBSD, you have to copy
  the result of getenv() or else a subsequent setenv() can change the stored
  value.

* VERSION 04.03.05 - 2024-04-01

- IMPROVEMENT: remind: Use inotify to detect reminder file changes
  even in regular daemon mode (-zn where n>0).

- INTERNAL IMPROVEMENTS: Rearrange and refactor some code.

- FIXES: Various fixes and improvements to man pages.

- BUG FIX: remind: Handle queued "SPECIAL COLOR" reminders correctly.

- BUG FIX: remind: Preserve the value of $DefaultColor that was in effect
  when a reminder was queued; restore it before issuing the queued reminder.

* VERSION 04.03.04 - 2024-03-25

- NEW FEATURE: remind: Add the new "multitrig" function, which is how "trig"
  should have worked in the first place.  See man page for details.

- IMPROVEMENT: tkremind: Make errors in your reminders file stand out more
  prominently.

- IMPROVEMENT: tkremind: If you click on an error in the "Errors..." popup,
  tkremind will open a text editor on the offending file and line.

- IMPROVEMENT: tkremind: Format the "Queue..." output better and make queue
  items clickable; clicking on a queue item opens a text editor on the
  corresponding file and line.

- IMPROVEMENT: Add a standard [$SysInclude]/moonphases.rem file to display
  moon phases on your calendar.

- IMPROVEMENT: Clean up the demo code in www/ and add PDF output.

- BUG FIX: tkremind: Correctly handle filenames containing spaces and other
  characters that tend to confuse the shell.

- BUG FIX: tkremind: Raise dialog boxes after errors so that they
  remain visible.

- CLEANUP: tkremind: Remove some dead code.

* VERSION 04.03.03 - 2024-03-18

- IMPROVEMENT: tkremind: Update icon to include a white border so it shows
  up better on dark backgrounds.

- IMPROVEMENT: C code: Fix a number of cppcheck static-analysis warnings.

- IMPROVEMENT: remind: Update the "-zj" protocol to include a queue-id for
  each queued reminder and add the DEL client command to delete a specific
  item from the queue.  Used by tkremind to implement "don't remind me about
  this again today."

- MINOR NEW FEATURE: Add a "-ds" debugging flag to print out expression-parsing
  stack high-water marks on exit.  This esoteric feature is of no use to
  anyone but the Remind author.

- IMPROVEMENT: tkremind: Stop using the deprecated tk_dialog command in favor
  of the newer tk_messageBox command.

- IMPROVEMENT: remind: In server mode, try to minimize redraws by
  consuming inotify events until at least 0.2s elapses without an
  event appearing.

- BUG FIX: tkremind:  The "Don't remind me about this again today" feature
  was unreliable and only worked for reminders created with TkRemind itself.
  It has been made more reliable and works with any reminder.

- BUG FIX: remind: Make it a syntax error if a local OMIT in a REM statement
  is not followed by at least one weekday name.

* VERSION 04.03.02 - 2024-03-01

- BUG FIX: remind: Fix a logic error when implementing the RUN command in
  server mode.  As it turns out, the error is harmless, but it's best to do
  things correctly.

- BUG FIX: The Makefile would install the tkremind.png and tkremind.desktop
  files in the wrong location.  This has been fixed.

* VERSION 04.03.01 - 2024-02-29

- BUG FIX: tests:  "make test" could fail because of a bad test.  This
  has been fixed.  There are no actual code changes to any of the programs
  in Remind compared to 04.03.00.

* VERSION 04.03.00 - 2024-02-29

- IMPROVEMENT: remind: If Remind is compiled on a system that supports
  inotify, then in server mode (-z0 or -zj) it monitors the reminders file
  and restarts itself if it detects a change, and also notifies the client.
  Moving inotify support directly into Remind means that tkremind no longer
  has to invoke a separate inotifywait process.

- IMPROVEMENT: remind: Set the CLOEXEC flag on files we open so we
  don't leak file descriptors to programs that we run.  While I don't
  think there's a security issue here (any program you run can do
  anything as your userid anyway) it's best to be clean and tidy.

- IMPROVEMENT: remind: Add localization for the Catalan language, courtesy
  of Eloi Torrents.

- IMPROVEMENT: tkremind: Add a .desktop file and icon so TkRemind can be
  integrated into the desktop menu system, courtesy of Eloi Torrents.

- CHANGE: Add a new server mode with the "-zj" flag.  This is just
  like "-z0" except it uses JSON messages to communicate with the
  client rather than an ad-hoc protocol.  The "-z0" mode is still
  supported, but is deprecated.

- CHANGE: In server mode (-z0 or -zj) any RUN-type reminders, or message
  commands of the "-kcommand" type are run with standard input and standard
  output connected to /dev/null.  NOTE INCOMPATIBILITY: If you previously
  relied on RUN-type reminders to pop up reminders in TkRemind, they no
  longer do.  If you want this, you'll have to get the command that you
  run to pop up its own window with "xmessage" or something similar.

- IMPROVEMENT: tkremind: Make the "Go to date..." dialog non-modal.

- CHANGE: remind: Allow the argument to easterdate() and
  orthodoxeaster() to be omitted, in which case it defaults to
  today().

- BUG FIX: Miscellaneous man page fixes.

- BUG FIX: Fix a leap-year edge-case.  The reminder: REM 29 MSG whatever
  was not triggered on Feb 29 of leap years.

- BUG FIX: rem2html: Make the version of rem2html track the version of
  Remind.  Noted by Ian! D. Allen.

* VERSION 04.02.09 - 2024-02-04

- CHANGE: remind: Do not attempt to guess terminal background color on
  startup.  Only obtain it as needed.  This can prevent mojibake from
  appearing on terminals that don't support the color query escape
  sequence.

- IMPROVEMENT: remind: Add new system variables $NumFullOmits,
  $MaxFullOmits, $NumPartialOmits and $MaxPartialOmits.

- IMPROVEMENT: remind: Issue a warning if someone OMITs every possible date.

- IMPROVEMENT: remind: In several error messages complaining about limits
  being exceeded, include the actual limit in the error message.  Clarify
  the man page regarding limits on the number of OMITs.

- MINOR NEW FEATURE: remind:  The expression STRING * INT or INT * STRING
  is now accepted and yields a string that is INT concatenations of the
  original STRING.  In this case, INT must be non-negative and the total
  string length can't exceed $MaxStringLen.

- DOCUMENTATION: Add "Astronomical Algorithms" by Jean Meeus to bibliography.

- DOCUMENTATION FIX: Update address of the Free Software Foundation in the
  license file.

- DOCUMENTATION: Note that rem2ps is deprecated and will not received any
  new features.  Further development will happen on rem2pdf.

- BUG FIX: Preserve the filename() and priority context for queued reminders.
  Previously, the filename information was lost and the priority was
  coming from uninitialized memory (yikes!).  bug found by Alexander
  Möller.

- BUG FIX: build.tk: Various minor improvements.

- BUG FIX: remind: In server mode, if we de-queue a reminder without
  triggering it, issue a "NOTE queued %d" message to update the
  client's notion of the queue size.

- BUG FIX: tkremind: Fix typo found by Lorenzo Bazzanini.

* VERSION 04.02.08 - 2023-12-14

- NEW FEATURE: Add the $MaxLateMinutes system variable.  This suppresses
  a queued time reminder if the current time is more than $MaxLateMinutes
  past the trigger time.  (This typically only occurs if the computer
  has been suspended/hibernated and then resumed.)

- IMPROVEMENT: tkremind: If an error occurs during printing, catch it
  and change the Queue... button to Errors... (the same way errors in
  reminder files are handled.)

- IMPROVEMENT: rem2html: add the --utf8 flag to set the HTML charset to
  UTF-8.

- MINOR IMPROVEMENTS: Refactor some of the C code; use symbolic exit
  statuses and file descriptors for stdin/stdout/stderr where possible.

- BUG FIX: configure.in: Use better option detection so we don't use the
  unsupported option -ffat-lto-objects if compiling with clang instead of gcc.

- BUG FIXES: Many fixes to man pages, some by Jochen Sprickerhof

- MINOR BUG FIX: If Remind puts itself in the background, only close
  stdout/stderr if they are not associated with a terminal.  If
  we close a descriptor, dup /dev/null onto it.

- MINOR BUG FIX: Catch SIGCONT when running in daemon/background mode.
  This forces the select() call to be interrupted so we can update the
  sleep time.  This really only matters if the computer or the background
  Remind process is suspended and then resumed.

* VERSION 04.02.07 - 2023-10-09

- IMPROVEMENT: remind: On 32-bit systems, attempt to use a 64-bit time_t
  if the C library supports that.  This lets Remind work properly with
  dates after 2038 in the few cases it has to call mktime() internally.

- MINOR NEW FEATURE: remind: Attempt to obtain the terminal background
  color using an OSC sequence.  This normally only happens if standard
  output is a terminal, but can be forced with the '-@..,t' option.

- MINOR NEW FEATURE: remind: Add "--version" long option to print out
  Remind's version and exit.

- MINOR IMPROVEMENT: tkremind: Use a higher-resolution PNG image for
  the icon.

- MINOR IMPROVEMENT: remind-conf-mode.el: Update highlighting rules
  courtesy of Bill Benedetto

- MINOR CHANGE: Make AT optional.  If we encounter a TIME in a REM
  command, implicitly begin an AT clause.

- DOCUMENTATION: Many minor fixes and improvements courtesy of Dan Jacobson.

- BUG FIX: Make "-w0" set the calendar width based on standard output
  rather than setting it to zero and causing an infinite loop.

* VERSION 04.02.06 - 2023-09-12

- NEW FEATURE: remind: The "nonomitted()" function takes an optional
  extra INT argument called "step".  See man page for details.  Also
  allows the "start" argument to be greater than the "end" argument,
  in which case they are effectively swapped.

- NEW FEATURE: remind: The "slide()" function takes an optional extra
  INT argument called "step", similar to "nonomitted()".  See man page
  for details.

- NEW FEATURE: remind: Added the $ParseUntriggered system variable;
  see the man page for details.  You almost certainly will never need
  to use this.

- NEW FILE: holidays/ie.rem: Added Irish holidays, courtesy of
  Amy de Buitléir.

- CHANGE: remind: The "-tn" option sets all REM statement deltas to
  ++n rather than adding n to any existing REM statement's delta.
  Additionally, the corresponding system variable $DeltaOffset has
  been renamed to $DeltaOverride.

- NEW OPTION: remind: Add the "-tz" option to explicitly set all
  REM statement deltas to zero.

- DOCUMENTATION FIX: remind: various documentation improvements.

- BUG FIX: Correct some errors in Italian localization, courtesy of
  Emanuele Torre

* VERSION 04.02.05 - 2023-04-11

- MINOR IMPROVEMENT: remind: If someone uses OMIT yyyy-mm-dd UNTIL yyyy-mm-dd
  give a better error message suggesting THROUGH instead of UNTIL.

- BUG FIX: remind: The fix for the combination of ADDOMIT and SATISFY that
  appeared in version 04.02.00 was not complete; the bug has finally been
  properly fixed.

- BUG FIX: remind: Remove an unnecessary #include <sys/file.h>.
  Nothing needed that and it broke compilation on FreeBSD.

* VERSION 04.02.04 - 2023-03-15

- NEW FEATURE: Remind: Add "htmlescape" and "htmlstriptags" built-in
  functions.

- NEW FEATURE: Rem2PDF: Add the "--wrap, -y" option to ensure that no
  printed calendar takes up more than 5 rows.  If a calendar would normally
  require 6 rows, wrap it so the last day or two appear on the first
  row instead of on a sixth row.

- NEW FEATURE: Remind: Improve the -k option to allow specification of
  separate commands for immediately-issued vs. queued reminders.  For
  example:

     remind '-kcmd1 %s' '-k:cmd2 %s' ...

  will use "cmd1" for immediately-issued reminders and "cmd2" for queued
  ones.  If you only use '-k:cmd2 %s' then immediately-issued reminders
  are simply printed as usual rather than being passed to a command.

- IMPROVEMENT: Remind:  Make "SPECIAL MSG" the same as just "MSG" and
  the same for MSF, RUN, PS and PSFILE.  This effectively lets you use
  expression-pasting to determine the type of a REM command; see the
  remind(1) man page for details.

- MINOR IMPROVEMENT: If "make test" fails, output up to 200 lines of diff
  so we can see immediately what failed.

- DOCUMENTATION FIX: Fix some typos; fix TkRemind syntax description.

- TEST FIX: Make tests run reliably regardless of local machine's time zone.

- BUG FIX: TkRemind: Don't crash if local installation of Tk lacks the
  -underlinefg configuration option.

- BUG FIX: examples/defs.rem: Fix up US Thanksgiving example.

- BUG FIX: include/holidays/us.rem: Add logic for US holidays that are
  observed on a Friday if the holiday is a Saturday, or on a Monday if the
  holiday is a Sunday.

- BUG FIX: TkRemind: Don't cut off MOON text at the first white-space
  character.

- BUG FIX: Remind: prevent functions defined on the command-line (as in
  remind '-if(x)=whatever') from segfaulting.

* VERSION 04.02.03 - 2023-02-10

- NEW FEATURE: Remind: add the orthodoxeaster() function to return the
  date of Orthodox Easter.

- IMPROVEMENT: Add Greek language support courtesy of JeiEl.

- IMPROVEMENT: Add Greek holiday file courtesy of JeiEl.

- IMPROVEMENT: Fix the Perl code (rem2pdf, rem2html) to silence Perl::Critic
  warnings

- IMPROVEMENT: Many internal code tweaks to eliminate many cppcheck
  static analysis warnings.

- DOCUMENTATION IMPROVEMENT: Clarify the distinction between a "time"
  and a "duration" as suggested by Ian! D. Allen.

- BUG FIX: Remind: Fix incorrect interaction between sortbanner() and
  MSF-type reminders.  Bug found by Tim Chase.

- BUG FIX: examples/defs.rem: Fix the calculation of US Tax Day as per
  Tavis Ormandy and Tim Chase.  Also fixed in include/holidays/us.rem

- BUG FIX: Remind: Add missing #include <fcntl.h> to funcs.c

- BUG FIX: Remind: Fix undefined integer-overflow behavior in built-in abs()
  function.  Pointed out on IRC by "ubitux".

* VERSION 04.02.02 - 2023-01-01

- NEW FEATURE: Remind: Add the NOQUEUE modifier to the REM statement for
  explicitly telling Remind not to queue a timed reminder.

- NEW FEATURE: Remind: Add soleq() function to return the DATETIME of
  solstices and equinoxes.  See $SysInclude/seasons.rem for an example
  of how to use the function.

- MINOR IMPROVEMENT: Update examples/astro to include solstices and equinoxes.

- BUG FIX: TkRemind: Provide better error indication if showing today's
  reminders fails on startup.

- BUG FIX: Remind: Refuse to read world-writable directories.

- BUG FIX: Tests depended on the actual date of the test run.  This has
  been fixed.

- INTERNAL CHANGE: Remind: Change inappropriately-named "Julian" variables
  to "DSE" (= Days Since Epoch) since they weren't really holding true
  Julian dates.

- INTERNAL CHANGE: Add "SPDX-License-Identifier" tags to most files.

* VERSION 04.02.01 - 2022-12-15

- MINOR IMPROVEMENT: TkRemind: If "Extra Remind Options" contains -m, make
  TkRemind start the calendar with Monday instead of Sunday.

- MINOR IMPROVEMENT: Sample files: Add French holidays courtesy of
  Clément Bœsch.

- MINOR IMPROVEMENT: A few performance fixes, likely not even noticeable in
  most cases.

- MINOR FIXES: Fix misleading comments in the source code.

- MINOR FIX: Remove a bunch of dead code in the moon-phase routines.

- MINOR FIX: Remove unnecessary %"...%" markers in holidays/us.rem

- MINOR FIX: Don't use the -ffat-lto-objects command-line option if we're
  compiling with Clang.

- MINOR FIX: Remind: Fix a broken printf-format string (need to double up on %
  to get a literal % in the output.)

- BUG FIX: Make test suite pass regardless of the date on which it is run.
  D'oh!!!

- BUG FIX: Make sure the banner gets printed each time through a "*N"
  command-line option loop.

* VERSION 04.02.00 - 2022-10-14

- NEW FEATURE: remind: Allow weekdays to be globally-omitted.  For example:

       OMIT Saturday Sunday

  globally-omits all Saturdays and Sundays.

- NEW FEATURE: remind: Add ansicolor() built-in function to make it easier
  to colorize reminders on the terminal.  Suggested by Tim Chase.

- NEW FEATURE: remind: Add several special variables related to the color
  mode: $UseVTColors, $UseBGVTColors, $Use256Colors, $UseTrueColors and
  $TerminalBackground.  Based on a suggestion by Tim Chase.

- NEW FEATURE: remind: Add utctolocal() and localtoutc() built-in functions.

- NEW FEATURE: remind: Add timezone() built-in function.

- NEW FEATURE: remind: Add trigtags() function per suggestion from Tim Chase.

- NEW FEATURE: remind: The $AddBlankLines system variable controls whether or
  not a blank line is added after each reminder.

- NEW FEATURE: remind: The built-in functions columns() and rows() return the
  width and height of the terminal (in character positions) respectively.

- NEW FEATURE: remind: The built-in function columns("string") returns the
  number of columns occupied by "string" on the terminal, taking into account
  double-width Unicode characters and zero-width ANSI escape sequences.

- NEW FEATURE: remind: You can add custom substitution sequences of the form
  %{name} or %*{name} that end up calling the function subst_name and using
  its return value as the replacement for the substitution sequence.

- NEW FEATURE: remind: Add the FUNSET command to undefine a user-defined
  function.

- NEW FILES: Add standard include files holidays/jewish.rem and
  ansitext.rem (the latter defines standard ANSI escape codes for
  changing text attributes such as bold, underline, etc.)

- NEW EXAMPLES: add examples/alignment.rem, examples/ansitext and
  examples/astro

- BUG FIX: remind: Make MSF correctly format UTF-8 text and text with
  embedded ANSI color-changing codes.

- BUG FIX: remind: Make ADDOMIT actually work correctly in a SATISFY-type
  REM command.  Bug found by Gunther Reißig

- BUG FIX: Convert documentation files and src/lang.h to UTF-8.  Patch
  from Jochen Sprickerhof.

- BUG FIX: Fix tests in non-UTF-8 locales.

- BUG FIX: Fix a few problems with the include/holidays/us.rem file.

- BUG FIX: remind: Fix an ancient logic error in DBufPutc that hurt
  performance.

- MINOR IMPROVEMENT: Clean up code and remove some dead code.

* VERSION 04.01.00 - 2022-09-25

- NEW FEATURE: remind: "remind -c" now supports the MOON special, printing
  the moon phases in the calendar if the locale supports UTF-8 encoding.

- NEW FEATURE: remind: "remind -c" now supports the SHADE special.  Works
  best with the 256-color extended XTerm palette or 24-bit true-color
  terminal escape sequences.

- NEW FEATURE: remind: "remind -c" now supports the WEEK special.

- NEW FEATURE: remind: The new "stdout()" function returns a string describing
  where stdout is going.  Examples of return values are "TTY" if remind's
  output is going to terminal, "FILE" if it's redirected to a plain file,
  or "PIPE" if it's going to a pipe.  See the man page for all the details.

- NEW FEATURE: Add the "-wt" option to set the calendar width to the terminal
  width even if standard output is a pipe.  Useful for situations like this:

      remind -wt -c .reminders | less -R

- CHANGE: "make install" now no longer strips debugging symbols from the
  remind and rem2ps executables.  Use "make install-stripped" if you want
  them stripped.

- CHANGE: remind: "remind -c" highlights today's date in bold, if
  colors are enabled.

- CHANGE: Dump string values with control characters escaped.

- DOCUMENTATION FIX: Document behavior of DO and filedir() with respect
  to symbolic links.

- DOCUMENTATION FIX: Add home page link to man pages.  Suggested by Ian! D.
  Allen.

- DOCUMENTATION FIX: Make date in man pages actually be the release date.
  Include Remind version in man pages.  Also suggested by Ian! D. Allen.

- DOCUMENTATION FIX: Fix inaccuracy in how string constants were documented.

- BUG FIX: Makefiles: Pass CFLAGS at link-time so link-time optimization
  actually happens.  Pointed out by Zoltan Puskas.

- BUG FIX: If the first REM command to trigger was a RUN command, the banner
  would not print.  This has been fixed.

- BUG FIX: replace deprecated 'fgrep' with 'grep -F' (Jochen Sprickerhof)

- BUG FIX: make "make test" depend on "make all" (Jochen Sprickerhof)

- BUG FIX: make "REM ... SATISFY ... MSG foo" respect $DefaultColor.  Bug
  reported by Gunther Reißig.

- BUG FIX: Don't consider IFTRIG true if we could not compute a trigger date.
  Bug noted by Gunther Reißig.

* VERSION 04.00.03 - 2022-08-16

- IMPROVEMENT: remind: add plain_body and calendar_body JSON keys in -pp...
  output.

- BUG FIX: tkremind: Don't create empty files called '&1' when creating
  a new reminder.

- BUG FIX: remind: Don't call signal-unsafe functions from signal handler

* VERSION 04.00.02 - 2022-08-02

- IMPROVEMENT: remind: Allow more forms of OMIT as per Ian! D. Allen's request:

               OMIT Month [THROUGH Month]
               OMIT Day Month [THROUGH Day Month]
               OMIT Day Month Year [THROUGH Day Month Year]

- BUG FIX: Make $T behave as documented, exactly like trigdate().  $T would
  return '1989-12-31' rather than 0 if the trigger date was not valid.

- BUG FIX: TkRemind: Fix resizing bug for a calendar with 6 rows.

- DOCUMENTATION IMPROVEMENT: Improve TkRemind documentation; document use
  of inotifywait if available.

* VERSION 04.00.01 - 2022-06-03

- IMPROVEMENT: Add $SuppressLRM system variable to suppress the UTF-8
  Left-to-Right mark in "remind -c" output.

- DOCUMENTATION FIX: Document the "q" sub-option to the "-p" option.

* VERSION 04.00.00 - 2022-04-04

- MAJOR NEW FEATURE: remind: Remind output can effectively be
  translated into other languages at run-time.  A number of system
  variables let you translate English words to another language, and a
  mechanism for altering the substitution filter at run-time lets you
  translate its output so the results are idiomatic.  See the man page
  sections "RUN-TIME SUPPORT FOR OTHER LANGUAGES", "RUN-TIME
  MODIFICATION OF THE SUBSTITUTION FILTER" and "LANGUAGE PACKS".

- NEW FEATURE: remind: Add the pad() built-in function

- NEW FEATURE: tkremind: Day numbers can be displayed left-aligned,
  centered or right-aligned.

- IMPROVEMENT: contrib/remind-conf-mode: The Emacs syntax-highlighter
  has been updated with the latest system variables and functions
  and has been made case-insensitive.

- IMPROVEMENT: remind, rem2ps: Use link-time optimization with gcc if
  possible.

- IMPROVEMENT: remind: Print better diagnostics when errors occur inside
  a user-defined function.  We now show the stack trace to make it easier
  to figure out where the error actually is.

- CHANGE: Add a "q" sub-option to the "-p", "-pp", and "-ppp" options.
  This causes Remind *not* to remove the %"...%" marker sequence from
  remind bodies.

- BUG FIX: rem2pdf: Make rem2pdf respect the --prefix ./configure flag.
  Loosely based on patch by Jonathan Kamens.

- BUG FIX: tkremind: Fix the "-m" flag, which was broken in 03.04.00.

- BUG FIX: Fix the overflow-detection functions so they work with link-time
  optimization.  The previous versions would be optimized away.

- BUG FIX: Warn if the arguments to the "-@" option are out of range.
  Problem noted by Ian! D. Allen.

- BUG FIX: Always interpret $Latitude and $Longitude input values in the
  "C" locale.  (We do accept localized input, but warn.)

- BUG FIX: Fix many spelling mistakes caught by Jens Schleusener

* VERSION 03.04.02 - 2022-03-14

- NEW FEATURE: remind: Add syntactic sugar to simplify some common
  types of reminders.  See "SYNTACTIC SUGAR FOR REM" in the remind
  man page.  Based on suggestions from Ian! D. Allen.

- CHANGE: examples/defs.rem: The examples file has been updated to use
  the newer syntactic sugar.

- CHANGE: remind: Always parse the body of REM statements to catch
  expression errors.  In the past, something like:

      REM 2025-01-02 MSG [1/0]

  would not cause a division-by-zero error except on 2025-01-02.  Now,
  the error is always caught.  NOTE POTENTIAL INCOMPATIBILITY: There may
  be edge-cases when formerly-valid remind scripts now trigger errors.
  However, this is pretty unlikely.

- NEW FEATURE: remind: Add the "trig" function to allow more
  expressiveness when creating triggers.  See man page for details.

- IMPROVEMENT: tkremind: Tweak the calendar display; improve ability to
  customize colors, including supplying two built-in themes.  Based on
  patch and suggestion from Paulo (last name unknown).

- IMPROVEMENT: tkremind: TkRemind handles errors in reminders scripts
  much more unobtrusively.  Instead of popping up a modal dialog box
  with almost-unreadable error output, it discreetly notifies you of
  errors with a button that lets you view the specific error messages
  in a more readable format.

- IMPROVEMENT: examples/remind.vim: Update list of keywords in vim syntax
  highlighting file.

- IMPROVEMENT: contrib/remind-conf-mode: Update the list of keywords,
  functions and variables in the Emacs syntax-highlighting file.  Also make
  it match them case-insensitively.

- CHANGE: remind: Increase $MaxSatIter default to 1000 instead of 150.
  Computers are much faster than when I first wrote remind and they
  can handle this higher limit easily.  The higher limit also enables
  certain reasonable reminders that failed in the past because of the
  low SATISFY iteration limit.

- CHANGE: remind: The "||" operator now returns the value of the first
  non-zero operand rather than just returning 1 or 0.  Similarly, "&&"
  returns 0 if either operand is false or the value of the last
  operand if both operands are true.

     NOTE POTENTIAL INCOMPATIBILITY: Remind scripts that depend on ||
     and && always returning exactly one of 1 or 0 may need
     adjustment.

- CHANGE: The || and && operators can accept any non-STRING type as long
  as both operands have the same type.  The "false" values are defined
  as follows; true values are any other value:

     INT:      0
     TIME:     00:00
     DATE:     '1990-01-01'             (the Remind epoch)
     DATETIME: '1990-01-01@00:00'       (the Remind epoch)

- IMPROVEMENT: remind: Issue diagnostics if an UNTIL or THROUGH date
  is earlier than any possible trigger date, as well as an UNTIL date
  with a fully-specified date and no repeat ("*N").  Suggestion from
  Ian! D. Allen.

- BUG FIX: tkremind: If the same moon phase appeared twice in a month,
  TkRemind would not display the first occurrence correctly.  This has
  been fixed.

- BUG FIX: rem2pdf: Fix typos in the man page.

- BUG FIX: remind: The IF command documentation didn't reflect how it
  actually worked; now it does.

- BUG FIX: remind: Use correct UNTIL/THROUGH keyword in error message.

- BUG FIX: rem2pdf: Correct the calculation that warns about an over-full
  calendar box.  Problem noted by Jonathan Kamens.

- BUG FIX: remind: The "remind -c" output would sometimes be incorrect if
  scripts with double-wide characters were used.  This has been fixed.

- BUG FIX: remind: The "remind -c" output would sometimes be incorrect
  if right-to-left scripts were used in reminders.  This has been fixed.

* VERSION 03.04.01 - 2022-02-23

- MINOR IMPROVEMENT: Support the INSTALL_BASE environment variable for
  installing rem2pdf in a non-standard location like your home directory.
  This is passed in to rem2pdf's Makefile at build and install time.

- MINOR IMPROVEMENT: ./configure: Add --disable-perl-build-artifacts flag
  to avoid installation of perllocal.pod and .packlist files.

- BUG FIX: tkremind: If the system date rolls over, update the display
  to correctly highlight the current date.  This worked in older versions
  of Remind, but was broken by 03.04.00.

- BUG FIX: rem2pdf: The small calendar font would sometimes be scaled
  incorrectly so the small calendar overflowed the box.  This has been
  fixed.

* VERSION 03.04.00 - 2022-02-10

- MAJOR CHANGE: Remind and its helpers (except for rem2ps) fully support
  UTF-8.  If your system locale is a UTF-8 locale and your terminal
  can handle UTF-8 encoding, you can enjoy full Unicode support in Remind.

- NEW FEATURE: Added a rem2pdf Remind-to-PDF converter.  It can handle
  the full UTF-8 character set and features a new PANGO special reminder
  type that lets you format the text in the PDF calendar (by changing the
  font size, color, underlining, etc.)

  rem2pdf requires the Pango and Cairo Perl modules.  On Debian or
  Debian-derived systems, these may be installed with:

      apt install libpango-perl libcairo-perl

  Unlike rem2ps, the default font in rem2pdf is "Sans" rather than
  "Helvetica", as Sans seems to be typeset better by the Pango library.

- NEW FEATURE: remind:  New system variables $Sunday through $Saturday
  and $January through $December let you set weekday and month names
  to whatever you like, permitting you to produce calendars in your
  local language, even if it's not one of the languages Remind supports
  by default.

- NEW FEATURE: tkremind: If rem2pdf installed, TkRemind offers you the
  choice of PDF or PostScript output in the Print dialog.

- CHANGE: remind: Increase the number of allowed "full OMITs" from 500
  to 1000.

- CHANGE: Remove the annoying code that slowed compilation and running
  on Windows and Mac OS X.  I believe the point has been made and free
  OSes have enough of a critical mass that the annoyances are
  counter-productive.

- CLEANUP: remind: C source code: Replace the LAT_DEG, LAT_MIN,
  LAT_SEC and LON_DEG, LON_MIN, LON_SEC macros with DEFAULT_LATITUDE
  and DEFAULT_LONGITUDE.

- CLEANUP: remind: C source code: Remove various unused or obsolete macros.

- BUG FIXES: Minor fixups to groff source and Makefiles courtesy of
  Jochen Sprickerhof.

- BUG FIX: Properly support formatting of double-wide characters in the
  terminal mode "remind -c" calendar.

- BUG FIX: rem2html: Document how to highlight today with a red border

- BUG FIX: rem2html: Generate and install a man page for rem2html

- BUG FIX: remind: Get rid of LAT_DEG/LAT_MIN/LAT_SEC and
  LON_DEG/LON_MIN/LON_SEC macros in favour of DEFAULT_LATITUDE and
  DEFAULT_LONGITUDE.

- IMPROVEMENT: All localized languages now use UTF-8 exclusively.
  Support for old character encodings like ISO-8859-1 and ISO-8859-2
  has been dropped since modern UNIXes have pretty much standardized
  on UTF-8.

- CHANGE: remind: Non-English versions of remind *no longer* accept
  non-English month- and weekday-names in trigger specifications.  This
  was a misfeature.  NOTE INCOMPATIBILITY.

* VERSION 03.03.12 - 2022-01-24

- UPDATE: rem2html: Use JSON::MaybeXS instead of JSON::Any, since JSON::Any
  is deprecated.  NOTE INCOMPATIBILITY: If you don't have JSON::MaybeXS
  installed, you'll need to install it before trying to install or update
  rem2html

- NEW FEATURE: Add a DO command.  This is just like INCLUDE, but relative
  paths are interpreted relative to the directory containing the current
  file.  That is:

      DO somefile.rem

  is equivalent to:

      INCLUDE [filedir()]/somefile.rem

- NEW FEATURE: Add the $DefaultTDelta system variable and associated
  -tt[N] command-line option to set a default time delta for timed
  reminder without an explicit +N delta.

- IMPROVEMENT: TkRemind: Store .tkremindrc in $XDG_CONFIG_HOME/tkremindrc
  or $HOME/.config/tkremindrc as per the XDG Base Directory Specification.

- BUG FIX: remind: Make the shell() built-in function respect
  $MaxStringLen

- BUG FIX: Use size_t to track the size of dynamic buffers rather than int.
  This permits Remind to read in files with lines longer than 1GB and to
  consume more than 1GB of output from the shell() command, both of which
  will surely be massively useful.  (The old limit was 1GB rather than 2GB
  because of details of the dynamic buffer resizing algorithm.)

* VERSION 03.03.11 - 2021-12-30

- IMPROVEMENT: TkRemind: Save the print dialog settings so they persist.

- IMPROVEMENT: TkRemind: Show queue in sorted order.

- IMPROVEMENT: TkRemind: Pass "-r" flag to inotifywait

- IMPROVEMENT: TkRemind: Draw moon phases with Tk canvas items rather than
  using PNG images.  This lets them change color along with other TkRemind
  preferences.

- IMPROVEMENT: TkRemind: Underline editable reminders when the pointer enters
  them; fire up the editor with either Button-1 or Button-3 for
  non-TkRemind-generated reminders.

- NEW FUNCTION: Remind: Add the isany() built-in function.

- IMPROVEMENT: rem2html: Add class names indicating number of rows in calendar

- IMPROVEMENT: remind: In -z0 mode, sleep with higher precision to ensure we
  wake as close to possible to each 1-minute boundary.

- IMPROVEMENT: rem2html: Coalesce table.rem-cal CSS into one block.  Thanks
  to Ian! D. Allen for pointing this out.

- IMPROVEMENT: examples/defs.rem: Modernize the examples and get rid of some
  cruft.

- CHANGE: Add $Latitude and $Longitude system variables.  Deprecate
  $LatDeg, $LatMin, $LatSec, $LongDeg, $LongMin and $LongSec.

- CHANGE: Test: Add "dump $" to test.rem.

* VERSION 03.03.10 - 2021-11-30

- IMPROVEMENT: TkRemind: Apply window and text colors to all GUI elements
  including buttons and status labels.

- NEW FEATURE: The new ADDOMIT keyword can shorten reminder files.
  The command:

      REM ...whatever... ADDOMIT MSG Foo

  behaves identically to:

      REM ...whatever... SATISFY 1
      IF trigvalid()
          OMIT [trigdate()] MSG Foo
      ENDIF

  For example, Labour Day can be displayed and omitted as follows:

      REM Mon 1 Sep SCANFROM -7 ADDOMIT MSG Labour Day

- UPDATE: Update contrib/remind-conf-mode to latest release

- CHANGE: The parser does not auto-convert numbers 90-99 to 1990-1999.  This
  was messing up things like "DURATION 90".  It also means you can no longer
  abbreviate the years 1990-1999 as 90-99.

- BUG FIX: Various documentation fixes

- BUG FIX: When switching users with the "-u" option, call initgroups()
  to properly set group membership list.

* VERSION 03.03.09 - 2021-10-14

- NEW FEATURE: Add "-+username" option to tell Remind to trust files owned by
  "username" and allow RUN directives in them.  Idea courtesy of Ian! D. Allen

- NEW FEATURE: Add "-u+username" variant to tell Remind to switch users to
  "username" without disabling RUN directives.  Idea courtesy of Ian! D. Allen

- CHANGE: rem2html: rem2html has been moved out of the www/ directory
  into its own rem2html/ directory.  If your system has the
  prerequisites (namely Perl, Getopt::Long and JSON::MaybeXS) then
  rem2html will be installed by "make install".

- CHANGE: Remove "cm2rem".  It was about 20 years obsolete.

- CHANGE: rem2html: Use inline data: URL images for moon images by default,
  thus producing a completely stand-alone HTML file.

- CHANGE: Remove unnecessary spaces from "remind -pp" JSON output.

- DOCUMENTATION FIX: Various man page fixes and tweaks.

- BUG FIX: rem2html: Tweak the default CSS stylesheet; more rational
  handling of rem2html command-line options.

- BUG FIX: remind: "remind -c" would sometimes highlight *two* days as
  "today"; this has been fixed.

- BUG FIX: Add a missing #ifdef...#endif and remove a C99-ism.  This once again
  allows Remind to be compiled with some very old C compilers.

* VERSION 03.03.08 - 2021-09-13

- NEW FEATURE: remind: Add INCLUDECMD command

- NEW FEATURE: remind: Add shellescape() built-in function

- BUG FIX: tkremind: TkRemind would sometimes fill in incorrect initial
  values for the reminder-editing form if you clicked on a TkRemind-created
  reminder to edit it.  This has been fixed.

- BUG FIX: tkremind: Get back better error messages from Remind if you
  try to create a reminder with an invalid date specification.

- BUG FIX: remind: Catch integer overflow if we try to evaluate $IntMin * -1

- DOC UPDATES: remind: Minor man page fixes

* VERSION 03.03.07 - 2021-05-10

- MINOR FIX: Refuse to run "make test" as root --- it would fail
  anyway with an obscure message.

- BUG FIX: Remind would sometimes compute incorrect trigger date for:
  REM Tue 29 Feb MSG ...

- BUG FIX: Remind would sometimes compute incorrect trigger date for
  a date spec like: Tue 31 2021 MSG ...

* VERSION 03.03.06 - 2021-03-30

- test/test.rem: Change local to en_US.utf-8 only if current locale
  is not a UTF-8 locale.

- MINOR CHANGE: Remind's arithmetic operators (+, -, *, /) give errors
  on overflow rather than silently giving the wrong answer.

- MINOR CHANGE: Add $IntMin and $IntMax system variables.

- DOCUMENTATION FIX: Document that TkRemind now requires Tcl/Tk version
  8.5 or newer.

* VERSION 03.03.05 - 2021-01-21

- NEW FEATURE: tkremind: Add ability to change fonts and colors from
  within TkRemind "Options" dialog.

- CHANGE: tkremind: TkRemind now requires Tcl/Tk 8.5 or newer.

- CHANGE: tkremind: You can specify the location of the options
  file on the command-line if you want to use one other than ~/.tkremindrc

- CLEANUP: tkremind: Remove "Apply Options" from Options dialog; we only
  need "Save Options".

- DOC FIX: Add missing release note in 3.3.4 notes regarding
  setpagedevice patch

- DOC FIX: tkremind: Document shortcut keys.

* VERSION 03.03.04 - 2021-01-12

- NEW FEATURE: If "inotifywait" is installed, TkRemind uses it to refresh
  the calendar display right away when the reminders file/directory is updated.
  This makes TkRemind react almost instantly if external tools are editing
  or updating reminders.

- MINOR NEW FEATURE: rem2ps has a new '-x' option; this puts the day numbers
  on the top-left of the day's box instead of the top-right.

- MINOR FIXES: A typo in remind.1 was fixed; additional comments regarding
  UNTIL were added.

- BUG FIX: rem2ps: Call setpagedevice to set page size.  Based on a patch
  from Jonathan Kamens.

* VERSION 03.03.03 - 2020-11-09

- BUG FIX: Fix startup crash in TkRemind if "Show Today's Reminders on
  Startup" is enabled (which, unfortunately, is the default.)  Bug reported
  by Martin Ziemer.

* VERSION 03.03.02 - 2020-11-08

- MINOR NEW FEATURE: Add MAYBE-UNCOMPUTABLE keyword; see the man page
  and discussion at
  https://dianne.skoll.ca/pipermail/remind-fans/2020/003745.html

- CHANGE: TkRemind always invokes Remind with the "-itkremind=1" option,
  even when printing.  NOTE INCOMPATIBILITY: This is a behavior change!
  When you print from TkRemind, we also invoke Remind with "-itkprint=1"
  so you can detect that PostScript is being generated.

- CHANGE: The maximum length of a variable name has been increased from
  16 characters to 64 characters.  Modern computers have plenty of memory.

- BUG FIXES: Minor documentation updates, typo fixes, clarifications, etc.

- BUG FIX: Fix calendar-drawing alignment errors when displaying UTF-8
  strings with zero-width combining characters and strings with tabs.

- BUG FIX: TkRemind would mess up placement of the WEEK special if invoked
  with the "-m" option.  This has been fixed.

- BUG FIX: TkRemind would sometimes fail with an error message when editing
  a reminder; this is because it was interpreting months 08 and 09 as
  illegal octal numbers.  This has been fixed.

* VERSION 03.03.01 - 2020-03-20

- CHANGE: For overlapping multi-day events, issue a reminder for the
  most *recent* event rather than the earliest event.  NOTE
  INCOMPATIBILITY: This is a behavior change!

- CHANGE: Do not convert 90-99 to 1990-1999 when parsing numbers to
  recognize years.  NOTE INCOMPATIBILITY: This is a behavior change!

- CHANGE: Revert change to -y option that included filename and line
  number in the hash.

- CHANGE: Retain newlines (produced by %_) in JSON output.

- FIX: Document $FormWidth system variable

- FIX: Highlight today's date in "remind -c" output

- FIX: Eliminate compiler warnings on Ubuntu 18.04.

- IMPROVEMENT: Allow times to be specified either in 24-hour mode
  (HH:MM or HH.MM) or AM/PM mode (HH:MMam; HH:MMpm, etc.)

- IMPROVEMENT: Allow DURATION to be specified as a time (1:30) or a
  number of minutes (90).

- IMPROVEMENT: If terminal size can be determined, set $FormWidth to
  terminal width - 8; if not, set $FormWidth to 72.

- MINOR IMPROVEMENT: Add the "ampm()" built-in function.

* VERSION 03.03.00 - 2020-01-31

- FIX: rem2ps: Add a %%PageBoundingBox: document structuring convention
  comment.

- FIX: rem2ps: Ignore unknown SPECIAL-type reminders.

- IMPROVEMENT: In calendar mode ("-c" option), Remind automatically adjusts
  the width of the calendar to fit the terminal window if standard output
  is a TTY.

- IMPROVEMENT: Add JSON-based output with "remind -pp" and "remind -ppp"
  The JSON-based intermediate format preserves a lot more information
  about the original reminder, allowing back-ends more insight into
  the intent of the reminder, the recurrence used, etc.  See the documentation
  in "man rem2ps"

- IMPROVEMENT: TkRemind can "reverse-engineer" reminders that it creates
  using the additional information in the "remind -pp" format, so it
  doesn't create or use ugly comment blocks to delimit the reminders
  it creates.

- IMPROVEMENT: TkRemind: Add popup help to most buttons and controls.

- NEW FEATURE: Add support for $DefaultColor system variable, suggested
  by Tim Chase.

- NEW FEATURE: The "-@[n][,m]" command-line option allows colored reminders
  in Agenda Mode as well as in Calendar Mode.  It also adds support for
  terminal emulators that can handle the xterm 256-color escape sequences
  as well as the true 24-bit color escape sequences.

- CHANGE: SPECIALs are now case-insensitive.  Before, only SPECIAL COLOR
  would work.  Now you can use Special Color, special color, etc.

* VERSION 03.02.00 - 2020-01-03

- IMPROVEMENT: Add support for events spanning multiple days (with AT
  and DURATION).  Add trigeventstart() and trigeventduration()
  introspection functions; see "MULTI-DAY EVENTS" in the man page.

- IMPROVEMENT: Add introspection functions trigback(), trigdelta(),
  trigduration(), trigfrom(), trigpriority(), trigrep(),
  trigscanfrom(), trigtimedelta(), trigtimerep(), and triguntil().  See
  man page for details; thanks to Tim Chase for the suggestion.

- IMPROVEMENT: TkRemind: Use PNG images for the next month / previous
  month buttons rather than -> and <-.  Also use nice anti-aliased
  moon phase images instead of ugly blocky bitmaps.

- CHANGE: Modify addition so that previously-illegal combinations
  TIME + TIME, TIME + DATETIME and DATETIME + TIME are now allowed.
  Also allow DATETIME - TIME.  If t1 and t2 are expressions of type TIME
  and dt is an expression of type DATETIME, then the following are now
  equivalent (before, the expressions on the left-hand side would fail
  with a "Type mismatch" error.)

  t1 + t2     ==     t1                + coerce("INT", t2)
  dt + t2     ==     dt                + coerce("INT", t2)
  t1 + dt     ==     coerce("INT", t1) + dt
  dt - t2     ==     dt                - coerce("INT", t2)

- DOC FIX: Document previously-undocumented $MaxStringLen system variable

- DOC FIX: Various minor documentation fixes.

- BUG FIX: Specifying a DURATION without an AT clause results in an error.
  Before, it would be accepted but not do anything useful.

- BUG FIX: Catch potential date overflow in slide() function

- BUG FIX: Fix compile error when compiling Romanian version; eliminate
  compiler warning when compiling non-English versions.

- BUG FIX: TkRemind: Fix startup failure of TkRemind if options are at
  default. :(

* VERSION 03.01.17 - 2019-11-15

- IMPROVEMENT: Add "Extra Remind Options" setting to TkRemind.

- IMPROVEMENT: Enable warning-free compilation even with gcc -Wextra flag.

- IMPROVEMENT: Warn if "OMIT a THROUGH b" has a > b.

- SYNTACTIC SUGAR: Make "SCANFROM -n" the same as "SCANFROM [today() - n]"

- BUG FIX: Don't dump expired reminders when dumping queue.

- BUG FIX: Fix failure when specifying a Jahrzeit in Adar.  Fix
  courtesy of Dov Feldstern

- BUG FIX: Fix various documentation errors and update man page.

* VERSION 03.01.16 - 2018-11-09

- IMPROVEMENT: Add patch from Stephen Morgan to calculate astronomical and
  nautical twilight in addition to civil twilight.

- BUG FIX: The rem2html script correctly handles a SHADE special with only
  one number (a grey level).

- IMPROVEMENT: Remind accepts DATETIME constants in ISO-8601 format and can
  optionally be configured to output them that way too.

- MINOR IMPROVEMENT: TkRemind puts its hostname in the window title bar.

- MINOR IMPROVEMENT: TkRemind restarts the background remind daemon if
  the .reminders file changes

- MINOR IMPROVEMENT: TkRemind has a "Queue" button that lets you see details
  of upcoming queued reminders.  This is mostly for debugging and the output
  is not particularly readable.

- BUG FIX: The definitions form Yom Hazikaron and Yom Ha'atzmaut were not
  quite right; they have been fixed.

- MINOR IMPROVEMENT: TkRemind centers popups over the main calendar
  window rather than over the desktop background.  This is better
  behavior in multi-monitor setups.

- BUG FIX: In "remind -z0" mode, remind wakes up exactly on the minute instead
  of sleeping for 60 seconds each time, which could cause it to fall behind.

* VERSION 03.01.15 - 2015-07-27

- BUG FIX: Fix a buffer overflow found by Alexander Keller

- BUG FIX: Fix a typo in this file: was 2014 instead of 2015.

- BUG FIX: Make parser reject an AT followed by more than one time.

- BUG FIX: Make parser reject repeated delta or *repeat values.

* VERSION 03.01.14 - 2015-04-24

- NEW FEATURE: Putting the line __EOF__ in a .rem file causes Remind
  to treat it as end-of-file.

- IMPROVEMENT: Use better PNG images for moons in the HTML display

- CHANGE: Author name updated from "David" to "Dianne"

- BUG FIX: The "-n" command-line option should really run in "ADVANCE_MODE"
  rather than "CAL_MODE" internally; otherwise, the substitution sequences
  may be misinterpreted.

- BUG FIX: A typo in clearing out MD5 sum context has been fixed.

- BUG FIX: Typo in Spanish translation was fixed.

* VERSION 03.01.13 - 2013-03-22

- BUG FIX: Sunrise/Sunset calculations greatly improved thanks to John
  McGowan.  Accuracy should now be within a couple of minutes in most
  places.

- BUG FIX: Allow specification of margins as low as 0 points in rem2ps,
  courtesy of Jonathan Kamens.

- BUG FIX: Permit compilation with gcc 2.95 (which doesn't allow variable
  declarations after non-declaration statements in a block.)

- BUG FIX: Several minor documentation errors corrected courtesy of
  Simon Ruderich.

- BUG FIX: Spurious test harness failure was fixed.

* VERSION 03.01.12 - 2012-01-23

- NEW FEATURE: Many substitution sequences "%x" have an alternate mode
  denoted by "%*x".  This alternate mode leaves out prepositions.  For
  example, in English "%i" might yield "on 01-25" while "%*i" yields only
  "01-25".

- BUG FIX: The "dusk" and "dawn" calculations were completely wrong.  They
  have been fixed.  Also, sunrise/sunset calculations have been tweaked,
  so the results may be off by a minute or two compared to previous versions
  of Remind.

* VERSION 03.01.11 - 2011-12-16

- BUG FIX: For some inexplicable reason, dawn was considered to happen when
  the sun was 14 degrees below the horizon instead of the standard 6
  degrees for Civil Dawn.  This has been fixed.

- BUG FIXES: Clarified the man pages and fixed some typos.

- BUG FIX: Add THROUGH to the remind.vim syntax highlighting file.

- ENHANCEMENT (?): Allow SPECIAL COLOR to be spelled SPECIAL COLOUR.

- BUG FIX: Apply minor Debian cleanups reported by Kurt B. Kaiser.

* VERSION 03.01.10 - 2010-11-01

- NOTE: This is the 20th anniversary of Remind's first public release.

- ENHANCEMENT: Add the THROUGH keyword.  You can omit blocks of dates with:

  OMIT start THROUGH end

  and the syntax REM start THROUGH end is equivalent to REM start *1 UNTIL end

- ENHANCEMENT: Add support for multibyte characters (eg, UTF-8) in calendar
  output.  Note that UTF-8 strings are still not supported in PostScript
  output.

- ENHANCEMENT: Add support for UTF-8 line-drawing characters in calendar
  output.

- ENHANCEMENT: You can have multiple TAG clauses in a REM statement.

- BUG FIX: Avoid spawning long-running background processes in "make test".

- BUG FIX: Don't declare variables in the middle of statements (old C
  compilers choke.)

* VERSION 03.01.09 - 2010-06-20

- MAJOR ENHANCEMENT: New "purge mode" to delete expired reminders.  See
  the PURGE MODE section of the remind man page.

- ENHANCEMENT: Support DURATION in TkRemind.  Thanks to Marek Marczykowski.

- BUG FIX: Don't change the order of PS and PSFILE reminders.  Bug found
  by John McGowan.

- BUG FIX: "REM 1990-01-01 SATISFY 1" would yield a spurious parse error
  in earlier versions of Remind.

- BUG FIX: Yom HaShoah is moved to Thursday if it would normally fall on
  a Friday.  Thanks to Jonathan Kamens for pointing this out.

* VERSION 03.01.08 - 2010-03-09

- ENHANCEMENT: Include some useful scripts in contrib/

- ENHANCEMENT: Add the $T, $Td, $Tm, $Tw, $Ty, $U, $Ud, $Um, $Uw, $Uy
  special variables to make reminder files less wordy.  See man page
  for details.

- MINOR ENHANCEMENT: Set an icon photo window manager resource on TkRemind.

- POLICY CHANGE: Discourage use of Remind on MS Windows or Apple Mac OS X.

- BUG FIX: Ignore msgprefix() and msgsuffix() on RUN-type reminders.

- BUG FIX: Adjust Remind and Rem2PS so that SHADE specials don't obliterate
  earlier MOON specials.

- BUG FIX: Fix bug in SCHED calculations if Remind is started in the middle
  of a SCHED interval.

* VERSION 03.01.07 - 2009-05-31

- ENHANCEMENT: Wherever you could write "day Mon year", the parser now
  accepts "YYYY-MM-DD".  This applies on the command-line and to the
  REM and OMIT keywords.  You can avoid wrapping date calculations in
  the trigger() function in many cases.

- ENHANCEMENT: New slide() built-in function eases some complicated reminders.

* VERSION 03.01.06 - 2008-11-16

- MAJOR ENHANCEMENT: A new OMITFUNC clause gives you additional
  control and flexibility over "omitted days" calculations.  This is
  useful when holidays influence the timing of events several days
  later.  See "COMPUTED LOCAL OMITS" in the man page.

- ENHANCEMENT: The new evaltrig() built-in function lets you evaluate triggers
  from within an expression.

- ENHANCEMENT: The new weekno() built-in function returns the ISO 8601
  week number of a date.

- ENHANCEMENT: The "WEEK" special lets you annotate calendar output with the
  week number.  The TkRemind, rem2ps and rem2html back-ends support WEEK.

- MINOR ENHANCEMENT: You can control whether timed reminders come before or
  after non-timed reminders with the "-g" flag.

- BUG FIX: TkRemind did not work correctly if ~/.reminders was a directory.

- BUG FIX: TkRemind incorrectly invoked Remind with the "-a" flag when
  showing today's reminders.

- BUG FIX: In certain cases, a trigger containing a day, month and
  weekday would fail if it needed to cross a year boundary.  This has
  been fixed.

* VERSION 03.01.05 - 2008-04-15

- MAJOR ENHANCEMENT: If you supply a directory name on the command line
  or for an INCLUDE command, then Remind reads all *.rem file in that
  directory (in the order returned by "glob")

- ENHANCEMENT: The plain-text calendar ("-c") can draw lines using VT-100
  line-drawing characters if invoked as "-cl"

- ENHANCEMENT: The plain-text calendar can approximate SPECIAL COLOR reminders
  using VT-100 color escape sequences if invoked as "-cc".  (You can combine
  the colors and line-drawing characters with -clc or -ccl.)

- ENHANCEMENT: The "-t" option can take a numeric argument n.  In this case,
  all reminders are assumed to have a delta of +n.  (Without the argument,
  an infinite delta is assumed, as before.)  If a numeric argument is given,
  the new system variable $DeltaOffset is set to the argument.

- MINOR ENHANCEMENT: The "-i" command-line option can be used to define
  a function as well as set a variable.

- MINOR ENHANCEMENT: String constants can have embedded quotes "Like \"this"

- MINOR ENHANCEMENT: tkremind works better on small screens like that of
  the Eee-PC.

- BUG FIX: Minor fix to HTML output courtesy of Ian! Allen.

- BUG FIX: Parse error in calendar mode was fixed.

* VERSION 03.01.04 - 2008-02-03

- ENHANCEMENT: tkremind respects the "-b1" option and operates in 24-hour
  clock mode if the option is supplied.

- ENHANCEMENT: tkremind has been tweaked to look better with Tcl/Tk 8.5.

- CLEANUP: Version is kept only in configure.in instead of two different
  places.

- CLEANUP: Added "const" qualifier to many places in the code that previously
  lacked it.

- BUG FIX: A rare parsing error involving interaction between SATISFY and
  SKIP has been fixed.

- BUG FIX: rem2html would output a horribly-wrong calendar for a 28-day
  February starting on Sunday (such as February 2009.)  This has been fixed.

- BUG FIX: The "-ivar=value" command-line option failed if Remind re-execed
  itself because we overwrote argv[].  This has been fixed.

* VERSION 03.01.03 - 2007-10-15

+ MINOR ENHANCEMENTS

- rem2html now uses CSS for a much better-looking calendar.
  NOTE: rem2html was completely rewritten and some of the command-line
  options have changed!

- If a reminder has a DURATION clause, then the starting and ending times
  are output in calendar mode.

+ BUG FIXES

- DST rules in "defs.rem" were updated to reflect new US/Canadian DST rules.

- If a REM command cannot compute a trigger date, the SATISFY expression
  is not evaluated.  This helps avoid spurious error messages in some
  reminders.

* VERSION 03.01.02 - 2007-09-12

+ MINOR ENHANCEMENTS

- build.tk tries to set defaults for location, paper size, etc from an
  existing "remind" installation if it detects one.

- In queue mode, wake up once a minute and recalibrate sleep time.
  This should make Remind work better on laptops that suspend or
  hibernate.  Note that "remind -q" does *not* handle date-rollover
  well; it simply exits if it notices date rollover.  "remind -z0"
  (as used by tkremind) handles date rollover properly; it rereads the
  reminder file and rebuilds the queue if it notices date rollover.

- tkremind: Added some key bindings to make navigation easier.

- tkremind: Made calendar boxes use space more efficiently.

- remind: The functionality of "rem" is now built into remind.  If you
  invoke remind as "rem", then it uses a default filename.  The installer
  sets up "rem" as a symbolic link to "remind".

+ CHANGE

- "remind -p" no longer sorts SPECIAL reminders before non-SPECIAL.

  *** THIS MAY AFFECT BACKENDS ***

  Backends supplied with Remind (rem2ps, rem2html and tkremind)
  are known to work properly.

- "remind -p" no longer suppresses any AT-time associated with SPECIAL
  reminders.

  *** THIS MAY AFFECT BACKENDS ***

  Backends supplied with Remind (rem2ps, rem2html and tkremind)
  are known to work properly.

+ BUG FIXES

- examples/defs.rem: A few corrections to Jewish holidays courtesy of
  Art Werschulz.

- src/Makefile.in: Added install-nostripped target.

- SPECIAL COLOR now works more like MSG, including proper support for AT and
  for the %" %" escape sequence.

- SPECIAL COLOR is queued correctly if it has an AT clause.

- Using the psshade() or psmoon() functions emits a warning on stderr.  You
  should use SPECIAL SHADE or SPECIAL MOON instead.

* VERSION 03.01.01 - 2007-08-23

+ MAJOR ENHANCEMENTS

- Added the "nonomitted" function that solves a number of
  moving-reminder-in-response-to-holiday problems.  The real-world
  problems solved are the "moving-garbage-day" problem and the
  "six-day-school-cycle" problem.

+ MINOR ENHANCEMENTS

- A few minor performance improvements in response to profiling runs.

+ BUG FIXES

- Prevent compilation failure with gcc 2.95.

- Fix trailing "s" bug with -k option.  This was fixed in Debian's release,
  but the Debian maintainer never bothered to let me know.

- Removed obsolete scripts: kall, rem, remind-all.sh, remind-all.csh

- Made "-n" output always use "/" as date separator for consistency with
  "-p" and "-s".

- Moon PNG images are transparent.  Output of moon phases in rem2html
  improved slightly.

- Various man-page fixes.

* VERSION 03.01.00 - 2007-07-14

+ MAJOR ENHANCEMENTS

- Added the FROM clause.  This lets you write reminders like:

  REM Mon FROM 16 July 2007 UNTIL 13 Aug 2007 MSG Some Mondays...

- Remind now has a new datatype: A DATETIME object represents a date AND
  a time (to the nearest minute).  DATETIME constants are written
  as '2007-09-01@14:33'.  Various operators and functions have been
  modified to do sensible things with DATETIMEs and several new DATETIME
  functions have been added.

- The SPECIAL COLOR reminder type has been hacked to behave more like
  a MSG type.  It sorts properly and is emitted as a normal reminder
  in non-calendar mode.  Similarly, SPECIAL HTML sorts with -g as well.

+ MINOR ENHANCEMENTS

- TkRemind can e-mail you reminders if you don't dismiss the popup window
  after one minute.  This is useful if you need to leave your workstation
  but want reminders to "follow" you via e-mail.

- A new "-y" option to Remind generates tags for all reminders that lack
  a TAG clause.  This may be useful for conversion tools that want each
  reminder to have a unique identifier.

- A new "tzconvert" function lets you convert datetimes between different
  time zones.  It's only as good as your C library, so test thoroughly
  please!  Based on a patch from Stefan Wehr.

- TkRemind sorts reminders by invoking Remind with the '-g' option.

- The time and date separator characters can be changed at runtime by
  setting $TimeSep and $DateSep respectively.

- The simple calendar ('-s') option can be immediately followed by an 'a'.
  This causes Remind to output reminders with deltas before the actual
  trigger date.  Based loosely on an idea from Frank Terbeck.

+ MINOR CHANGES

- Default date separator is now '-' instead of '/'

- trigdate() and trigtime() behave differently - they return the integer 0
  if the last reminder could not be computed or did not have an AT clause
  (respectively).

- Maximum length of variable names has been increased from 12 to 16 characters.

+ BUG FIXES

- Fixed a potential memory leak in queue.c

- Fixed compile error on Mac OS X.

- Fixed behaviour of "-sa" option so deltas correctly obey omitted days
  and the scheduling function (if one is used).

- rem2ps would produce invalid PostScript in some rare cases
  (eg, for February 2007).  This has been fixed.

* VERSION 03.00.24 - 2005-11-19

+ MINOR ENHANCEMENTS

- Permit the DURATION of a reminder to be as high as you like.  Previously,
  DURATIONs could be at most 23:59.  Fix courtesy of Paul Pelzl.

- The "-n" flag can be usefully combined with "-s", "-p" and "-l" now.
  Fix courtesy of Paul Pelzl.

+ BUG FIXES

- The "-k" command escapes all characters except those known to be
  safe, rather than attempting to escape only characters thought to be
  unsafe.

- Removed the crufty code that supported non-ANSI C compilers.

- Removed all support for non-UNIX/non-Linux systems.

- Fixed a bug in the tokenizer that could make Remind segfault.  Fix courtesy
  of Stan Tobias.

* VERSION 03.00.23 - 2005-04-14

+ MINOR ENHANCEMENTS

- Added the COLOR special for putting colored reminders in the calendar.
  Supported by the HTML, Tcl/Tk and PostScript back-ends.

- Many minor tweaks to tkremind.

- Added ability to specify paper size in inches or centimetres to rem2ps.

- Added the "-l" option to Remind.  This outputs additional information
  for back-end programs that use the "-p" output format.  Currently
  used only by the "tkremind" back-end.

- Fixed dates for Yom Hazikaron and Yom Ha'atzmaut if 5 Iyar falls on a
  Saturday.  (Hebrew calendar fix.)

- Added support for the Icelandic language, courtesy of Björn Davíðsson.

+ BUG FIXES

- Fixed parser error for unterminated date constant: '2005/01/01

* VERSION 03.00.22 - 2000-06-16

+ MINOR ENHANCEMENTS

- Added option to have TkRemind display all of today's reminders in a text
  box on startup.  This option is on by default.

- Makefile in "www" directory allows you to add ".cgi" suffix to CGI scripts.

- Added option to completely delete a reminder from the reminder file in
  the timed reminder popup dialog.

- Clarified build instructions.

+ BUG FIXES

- Fixed packing order in TkRemind so resizing window doesn't make control
  buttons disappear.

- Fixed serious bug in which background queued reminders were ignored and
  Remind simply exited.  Doh!  Sorry about that.

* VERSION 03.00.21 - 2000-03-15

+ MINOR ENHANCEMENTS

- Updated copyright years and contact info.

- Changed GIF images to PNG to avoid patent problems.

- Added "cm2trem.tcl" to convert from CDE's "cm" calendar manager to Remind
  format.  It handles only an older version of "cm" data; there is a utility
  available (under Solaris anyway) to convert newer files to the older "cm"
  format.

- Fixed the scripts in the "www" directory to install and work properly.

- Added "remind.vim" file for Vim syntax highlighting of Remind files,
  thanks to Davide Alberani.

- Added "dusk" and "dawn" built-in functions, thanks to Ron Aaron.

+ BUG FIXES

- Files for no-longer-supported platforms (OS/2, amiga, MS-DOS) have been
  moved to OBSOLETE subdirectory.  They will disappear unless someone
  wants to maintain them.

- Fixed typo which caused compilation failure on compilers without function
  prototypes.  Thanks to Ian Darwin for the patch.

- Fixed compilation problem on FreeBSD, IRIX, Tru64 and other UNIXes.

* VERSION 03.00.20 - 1999-04-12

+ LICENSE CHANGE

- Remind is now distributed under the pure GPL.  See the file WINDOWS for my
  feelings about a Windows port, however.

+ MINOR ENHANCEMENTS

- Made TkRemind adjust for really low-resolution displays if necessary.

- Added more print options to TkRemind, courtesy of Niels Kristian Bech Jensen.

- Added Spanish language support, courtesy of Rafa Couto.

+ BUG FIXES

- Rem2PS was passing specials like HTML, etc. in PostScript output.
  YECH!  Fix courtesy of Derek J. Decker.

- Fixed a typo in danish.h, courtesy of  Niels Kristian Bech Jensen.

* VERSION 03.00.19 - 1998-05-09

+ MAJOR ENHANCEMENTS

- Added MOON and SHADE specials.  These now work with PostScript,
  HTML and Tcl/Tk front-ends.  You can have cute moons and shaded
  boxes on your printer, on your screen and in your web browser. :-)

- TkRemind overhauled -- you can now edit and delete reminders from
  the GUI.  You can actually reasonably use Remind without learning
  the scripting language.

- TkRemind overhauled -- "server mode" added to Remind; TkRemind will
  now pop up timed reminders.

+ MINOR ENHANCEMENTS

- Updated romanian.h, courtesy Liviu Daia.

+ BUG FIXES

- Allowed object files to be built in different directory from
  source files (thanks to Jonathan Kamens <jik@American.COM>

- Removed restriction against reading group-writable files.  This
  caused headaches on Red Hat Linux which uses an unusual user/group
  scheme.

- Remind would not compile if a non-English language was selected.

- Fixed free() of a NULL pointer.

- Made tkremind display a helpful error message if Remind's
  "security feature" of not reading a group-writable file kicks
  in.

- Fixed bug which sometimes prevented reminder times from appearing
  in a calendar display.

- Lots more silly little bugs squashed -- too many to go into in
  detail.

* VERSION 03.00.18 - 1998-02-15

+ MAJOR ENHANCEMENTS

- Added the script "build.tk" which makes it trivial to compile
  and install Remind under UNIX -- no need to edit Makefiles or
  header files.  A nice GUI installation dialog!

- Got rid of all fixed-size buffers.  Hurray!  Everything is dynamic --
  no built-in limits on line length, token size, etc.  This should
  cure lots of SEGV's for weird files.

- Added TAG and DURATION clauses for communicating more information to
  back-ends and eventually converting REMIND into a full-fledged
  scheduler.

- Completely reworked the PS/PSFILE mechanism to use the more
  general SPECIAL mechanism for customizing output in REMIND back-ends.

+ MINOR ENHANCEMENTS

- Made parser _very_ forgiving -- the type of reminder now defaults
  to MSG.  This lets you have lines in the reminder file like this:

        Feb 9, 1998 Meeting with Joe.

  But I don't recommend abusing it.  It's mostly to ease migration from
  UNIX calendar(1) files.

- Documented the "remind -p" format.

- Made Remind communicate day and month names to back-ends so they
  can automatically take on the language Remind was compiled with.

- Directory structure totally reorganized.  Remind now uses an autoconf
  "configure" script which should make life very pleasant for UNIX
  people.

- Made Rem2HTML work properly if more than one month's worth of calendar
  data was produced.  Rem2HTML also escapes any special HTML characters.
  However, it recognizes a "SPECIAL HTML" type of reminder which lets
  you put arbitrary HTML code in your calendar entries.  See www/rem2html
  for details.

- Added the "-a" option to Rem2HTML to complement the "-p" option.  Also
  made Rem2HTML print a usage message if input is coming from a terminal.

+ BUG FIXES

- Fixed sunset(), sunrise() and minsfromutc() functions which were broken
  by 3.0.17.  (In 3.0.17, they did not account for daylight saving time.)

- Updated "finnish.h" to include proper URL and translation of all
  error messages.

+ BUG INTRODUCTIONS

- The reorganization and use of "configure" probably breaks Remind
  installation on non-UNIX platforms.  Sorry.  I can't fix it until
  I hear back from non-UNIX maintainers.

- Getting rid of fixed-sized buffers meant lots of changes to code.
  No doubt, I missed a few regression tests.

* VERSION 03.00.17 - 1997-09-07

+ MINOR ENHANCEMENTS

- Made REMIND accept date specs like "Jan 6, 1998" -- the comma is
  ignored.  This was suggested by John Conover <john@johncon.johncon.com>.
  You can even do "REM 27, Aug, 1998, msg bar".  (But I don't know why
  you'd want to.)

- Added www/rem2html, a Perl script which converts the output of
  `remind -p ...' to an HTML table.  The script was contributed by
  Don Schwarz <darkowl@mcs.net>

- New security features: Because of the risks of statically-allocated
  buffers, REMIND now refuses to run if it is installed set-uid or set-gid.
  If REMIND is run as root, it refuses to read files not owned by root.
  It also won't open group- or world-writable files, no matter who is
  running it.  Finally, if you read a file you don't own, REMIND disables
  RUN and shell().  REMIND doesn't do these security checks on stdin,
  though, so be careful if you run it as root in a script.

  NOTE:  REMIND doesn't do the world- and group-writable checks
  on devices, FIFOs, etc.  Otherwise "remind /dev/null" fails...

+ BUG FIXES

- Increased sizes of some statically-allocated buffers.  This doesn't
  really fix the problem, but makes it more manageable.

- Using the "-u" option now implies the "-r" option.  This is a
  security feature.

- Added romanian.h to the manifest.  Sorry.

- CalcMinsFromUTC was failing if time_t was unsigned.  I now use
  difftime(), but not all systems have it.  Also, defs.rem was rearranged
  so PostScript stuff works better, and new target "emxomf" was added to
  makefile.os2 which uses OMF linking and a dynamically-linked C
  library.  All three of these fixes are courtesy of Christopher
  J. Madsen <madsen@iglobal.net>.  Thanks, Christopher.

* VERSION 03.00.16 - 1997-02-11

+ MINOR ENHANCEMENTS

- Bundled scripts for making a nice WWW calendar server.  See the
  "www" subdirectory in the release.

- Added support for the Romanian language, courtesy of Liviu Daia.

- Changed sunrise() and sunset() as follows:  If the sun never rises,
  sunrise() returns 1440 and sunset() returns 0.  In this case,
  sunrise()-sunset() returns the length of the dark period of the
  day, in minutes.  If the sun never sets, sunrise() returns 0 and
  sunset() returns 1440, and sunset()-sunrise() returns the length
  of the light period of the day, in minutes.  Thanks to Michael Salmon
  for explaining the utility of this.  See the file "defs.rem" for the
  functions _light_len and _dark_len which return the length in minutes
  of the light and dark period of the day, respectively.

+ BUG FIXES

- If you used the "-g" option, then no background reminders were
  ever issued.  DOH!  Thanks to Greg Badros <gjb@cs.washington.edu>
  for pointing this out.

- Fixed a problem under Solaris 2.5 whereby rem2ps was skipping some
  latin1 characters which it interpreted as white space.

* VERSION 03.00.15 - 1996-10-27

+ IMPORTANT NOTES

- The tar file now unpacks into a Remind subdirectory rather than into
  the current working directory.

- I no longer support Remind under DOS.  I don't think I've done anything
  to stop it from working under DOS, but will no longer compile and test
  it under DOS, and can't help you if you get stuck.  Sorry -- I no longer
  have a DOS machine.

+ MINOR ENHANCEMENTS

- Changed psshade() to accept 1 or 3 arguments for colored shading in
  PostScript calendar mode.

- Added a Print dialog to tkremind.

- Added support for Brazilian Portuguese courtesy of Marco Paganini

- Added support for Italian courtesy of Valerio Aimale

+ BUG FIXES

- Fixed confusing error in rem2ps help messages.

- Fixed bug in TkRemind which caused a crash if the "-m" option was used
  for a month beginning on Sunday.  Doh!!!

* VERSION 03.00.14 - 1996-05-25

+ CHANGE IN COPYING POLICY

- Remind is now distributed under an _AMENDED_ version of the Gnu
  General Public License.  These amendments are listed in the
  file COPYRIGHT.  The amendments were made for personal reasons;
  please don't ask me to explain them.  They probably don't affect
  you, anyway.

+ MAJOR ENHANCEMENTS

- Added an X-Windows front-end to Remind.  To use it, you must be
  running under X-Windows on UNIX, and have the "wish" tcl/tk
  interpreter, version 7.4 of tcl and 4.0 of tk.  The front-end is
  called "tkremind".

+ MINOR ENHANCEMENTS

- Added the WARN keyword for precise advance notice.  You can now
  have advance warning 5, 3, 1 and 0 days in advance (for example.)
  The WARN keyword operates similarly to the SCHED keyword in that it
  calls a user-defined function to obtain the advance warning sequence.

- Added support for QDOS/SMSQ on the Sinclair QL microcomputer,
  courtesy of Robert H. Klein <kleir000@goofy.zdv.Uni-Mainz.de>
  NOTE THAT I CANNOT TEST NOR SUPPORT THIS VERSION!

- Added support for AmigaDOS / SAS/C, courtesy of Martin Hohl
  <martinh@caverna.tynet.sub.org>.  As before, I CANNOT TEST NOR
  SUPPORT THIS VERSION, but will rely on feedback from others.

+ BUG FIXES

- Removed the "-n" option from Rem2PS.  Instead, if you want the
  PostScript calendar to start on a Monday, supply the "-m" option
  to Remind.  It was repugnant to have two options to two programs
  to accomplish one thing.

- The "hebdate" built-in function worked incorrectly with 5 arguments.
  The bug was pointed out by Hershel Safer <h.safer@ieee.org>

- This would hang up REMIND:   REM Mon 31 Feb MSG Foo
  and this would fail quietly: REM Mon 31 Feb 1996 MSG Foo
  Both have been fixed and now report bad date specifications.

- Remind now compiles without complaint under gcc -ansi -Wall -pedantic
  (on my Linux system, anyway!)

+ IMPORTANT NOTE

- I had problems building the DOS version with Turbo C.  I have access
  only to ancient versions of Turbo C and Microsoft C.  Remind built
  fine with Microsoft C, but the TC version hung up.  I am not too
  interested in maintaining the DOS version, so when the MSC compiler
  no longer works, I will drop DOS support.  Please not that I will
  _not_ support MS Windows, and in fact do not allow Remind to run
  under Windows (see COPYRIGHT).

* VERSION 03.00.13 - 1994-05-06

+ MINOR ENHANCEMENTS

- Added extra parameters to the "psmoon" built-in function so you
  can annotate the PostScript moon icons.

- Added a command-line "time" argument to Remind for testing Remind
  scripts with specific system times.  Also added the realnow() function
  which has the same relationship to now() as realtoday() has to today().
  (See the man page!)

- Modified Rem2PS so it prints progress messages to stderr if
  '-v' command-line argument is used.

- In the top of the 'finnish.h' file, added a note about
  Mikko Silvonen's file of Finnish holidays.

+ BUG FIXES

- Fixed a bug in rem2ps which sometimes caused incorrect PostScript if
  the -e and -m options were used.  Thanks to Michael Neuhauser for
  reporting the bug and providing a fix.

- Made the '-k' option escape shell characters in the message to make it
  safer.

- Fixed a segmentation violation which resulted if not all
  PUSH-OMIT-CONTEXTs were balanced by POP-OMIT-CONTEXTs.

- Removed the prototype for DestroyValue, which is now a macro.  I'm
  amazed that very few compilers complained about this one!

- Updated the copyright notices everywhere.

* VERSION 03.00.12 - 1994-02-01

+ MINOR ENHANCEMENTS

- Added support for the Danish language, courtesy of Mogens Lynnerup.

- Added support for the Polish language, courtesy of Jerzy Sobczyk.

- Made the Makefile more portable, thanks to Jim Budler.

- Removed some compiler warnings under Linux, thanks to Francois Pinard.

- Tidied the man page a bit; added a small bibliography.

+ BUG FIXES

- Fixed a problem with the '-k' option which resulted in a newline being
  placed after the message text.  This was giving sh(1) heartburn...

* VERSION 03.00.11 - 1993-11-26

+ MINOR ENHANCEMENTS

- Added release notes to README.UNIX and README.OS2 describing one
  way to make pop-up alarms under X-Windows and Presentation Manager.

- Added the $DefaultPrio system variable

- Improved OS/2 support, thanks to Darrel Hankerson, Russ Herman
  and Norman Walsh.

- Made the pushing and popping of operators and operands during
  expression evaluation in-line code instead of function calls.  Did the
  same for DestroyValue.  I'm not sure if this was a good idea -- on the
  Sparc using gcc, this slowed things down... go figure.

+ BUG FIXES

- Fixed a potential memory leak in the char() function.

- Made the TRIGGER() built-in function return its answer in English even
  for the foreign-language versions -- this was required for compilers which
  are not 8-bit clean, and for languages with accented letters.

- Made expression evaluation slightly faster by eliminating some unnecessary
  copying of string values.

- Corrected some non-portable definitions of the macro UPPER(c)

- Fixed typos in french.h

* VERSION 03.00.10

+ MAJOR ENHANCEMENT

- OS/2 support is now much better, thanks to Russ Herman.  The Borland
  C compiler under OS/2 and MS-DOS is supported.

+ MINOR ENHANCEMENTS

- Added the SCHED keyword for precise control of scheduling of timed
  reminders -- it's really quite nifty!

- Modified the trigger() function to take up to three arguments -- in
  addition to a date, you can specify a time and a flag specifying that
  the trigger should be converted from UTC to local time.

- Added $SortByDate, $SortByTime and $SortByPrio system variables.

- Added test suites for MS-DOS and OS/2, courtesy of Russ Herman.

- In PostScript output, the month and year are output in the %%Page: comments.
  Makes it nicer to view multi-month calendars with previewers (eg,
  GhostView.)

- Added the PRIORITY keyword for more control of sort order of reminders.
  Based on a suggestion by George M. Sipe.

- Added the msgprefix() and msgsuffix() evaluations around MSG-type
  reminders for doing fancy things with reminders of different priorities.
  Also added calprefix() and calsuffix() for doing the same thing in
  calendar mode.

- Enabled the -g option during calendar mode as well as regular mode.

+ BUG FIXES

- Fixed minor bugs in the LocalToUTC and UTCToLocal functions.

- "remind -c -de file" used to cause a segmentation violation.  Whoops...

- Some files which should have included <string.h> didn't include it - these
  are now fixed.

- Fixed the moondate() and moontime() functions, which used to be incorrect
  after November 1994.

- Fixed the Finnish language support which was missing a few newlines.

* VERSION 03.00.09 - 1993-10-04

+ NOTES

- Remind is now too big to compile under the "small" model in
  MS-DOS.  You must recompile everything under the "medium" model.

+ MAJOR ENHANCEMENTS

- Functions moonphase(), moondate() and moontime() were added for dealing
  with phases of the moon.  The code was snarfed from "moontool" by
  John Walker - see the file "moon.c" for detailed acknowledgement.  Also
  added psmoon() for putting little moon symbols on the PostScript calendar.

+ MINOR ENHANCEMENTS

- Added some more examples to defs.rem - notably, support for ANSI
  terminal color-changing escape sequences, thanks to Gail Gurman.

- Modified both Remind and Rem2PS so that calendars can start on Sunday or
  Monday, depending on your preference.  Unfortunately, the command-line
  options are different -- for Remind, it's '-m' and for Rem2PS it's '-n'
  because '-m' was already in use.  Based on a suggestion by John Plate
  and a patch sent by Mikko Silvonen.

- The Finnish language support is better - now, all usage and error
  messages are in Finnish.  In addition, the Finnish language module
  supports the IBM extended character set as well as ISOLATIN1.
  Thanks to Mikko Silvonen.

- Modified Rem2PS to allow more control over the placement of the small
  calendars, thanks to a suggestion by Frank Vance.  Also added option
  to control the calendar title (e.g., "September 1993") independently
  of day-of-week headings.

- Added the psshade() function to make it easier to shade PostScript
  calendars.

- Allowed a repeat parameter '*num' to be supplied on command line so
  a 'preview' of many days' worth of reminders can be obtained easily.

- Added the $Location system variable.

- Allowed an expression to be supplied to EXIT to return an exit
  status.

- Added the FLUSH command.

+ BUG FIXES

- Fixed the MSF-type reminder to fill paragraphs more intelligently.
  It puts double spaces after '!', '.' and '?', and can handle quotes,
  brackets, etc. after periods, etc.  These characters can be specified
  with the $EndSent and $EndSentIg system variables.  Also modified it
  so that newlines in the body start new paragraphs, rather than being
  swallowed as white-space.

* VERSION 03.00.08 - 1993-09-08

+ MAJOR ENHANCEMENTS

- Changed the code to more fully support foreign languages - error
  messages and usage instructions can now be changed.  All changes can
  be localized in the appropriate language.h files.

- Added support for the French language, courtesy of Laurent Duperval.
  Note that the French support is more complete than for other languages -
  French usage instructions and error messages are supported.

- Added support for the Norwegian language, courtesy of Trygve Randen.

+ MINOR ENHANCEMENTS

- Added code for the functions timelocal() and timegm(), courtesy of
  Lucio de Re.  This is for those very few machines whose libraries
  include neither those functions nor mktime().

- Added the filedate() function.

- Allowed the filename to be specified as "-" to cause Remind to take
  its input from the standard input stream.

- Added the "MSF" keyword to cause reminders to be formatted automatically.
  This keyword paragraph-fills reminder text following user specifications.
  Based on a suggestion by Ken McGlothlen.

- Added the "-e" option to Rem2PS, allowing the PostScript calendar
  to fill the entire page.  Thanks to Arthur G. Yaffe.

+ BUG FIXES

- Corrected the Hebrew holidays Tzom Gedalia, Tzom Tevet, Ta'anit
  Esther, Tzom Tamuz and Tisha B'Av so they won't occur on Saturday.
  Corrections made following the algorithm in "Calendrical Calculations"
  by Nachum Dershowitz and Edward M. Reingold.

- Changed the dutch.h language file as suggested by Erik-Jan Vens.  Made
  month and day names lower-case; corrected the spelling of oktober.

- Changed HashVal in var.c to use unsigned arithmetic - it's conceivable
  that a machine with signed chars could cause problems otherwise.

- Changed the LONG_* macros in config.h to LON_* to avoid conflicts
  with names defined by ANSI C.  Thanks to David W. Sanderson.

- Allowed the built-in function char() to accept numbers in the
  range [-128, 255] (but not 0) so that char(asc(s)) works even
  on machines with signed char types.

* VERSION 03.00.07 - 1993-07-22

+ MAJOR ENHANCEMENTS

- Added "system variables" to allow the user more control over
  Remind operation, and to allow queries about the command-line
  options from within a reminder script.  They allow for specification
  of longitude and latitude for use by sunrise/sunset calculations.

- Added sunrise(), sunset(), isdst() and minsfromutc() functions -
  these are needed to support sunrise and sunset calculations.

+ MINOR ENHANCEMENTS

- Allowed the MSG, RUN, CAL, PS and PSF keywords to be used in the
  same reminder as the SATISFY keyword.  This makes many complex
  reminders more compact.

- Added the filedir() function to enable Remind's include to emulate
  CPP's #include more closely.

- Allowed non-root users to use the "-u" option.  It only affects
  the "SHELL", "HOME", "USER" and "LOGNAME" environment variables -
  it doesn't change the effective uid and gid when run by non-root.

- Added built-in function "easterdate" to calculate date of Easter
  Sunday - function courtesy of Michael Salmon.

- Improved the Jewish holiday reminders in "defs.rem" to give advance
  notice of holidays.

- Allowed the "simple calendar" option (-s) to specify a number of
  weeks as well as a number of months, in the same fashion as the
  -c option.  Thanks to Dave Rickel.

+ BUG FIXES

- Corrected the behaviour of "hebdate" for jahrzeits; added an additional
  parameter to specify the behaviour of dates in Adar during leap years.

- Changed kall so that "kall sh" doesn't commit suicide - patch courtesy
  of Michael Salmon.

* VERSION 03.00.06 - 1993-05-05

+ MINOR ENHANCEMENTS

- Added the PS- and PSFILE-type reminders - these allow you to include
  arbitrary PostScript code in your PostScript calendars.  Useful for
  shading, drawing graphics on calendars, etc.  Use with care, though!

- Added the "-ivar=val" option to initialize variables from the command
  line.  Changed the remind-all.* shell scripts to predefine the variable
  "remind_all".

+ BUG FIXES

- Fixed a bug in the hebmon(), hebday() and hebyear() functions - there
  was an off-by-one error.  Sorry!

- Fixed a bug in the hebdate() function which resulted in infinite loops
  for dates after about 2075

- Fixed a bug in the -u option which sometimes caused a core dump
  (embarrassed grin!)  The fix is due to Tina Hoeltig.  Thanks, Tina!

* VERSION 03.00.05 - 1993-04-27

+ MAJOR ENHANCEMENTS:

- Added support for the Hebrew calendar - can now specify Jewish holidays
  easily.  Thanks to Amos Shapir for explaining the Hebrew calendar, and
  to Danny Sadinoff, from whose HEBCAL program I got some inspiration.
  Also thanks to David W. Tamkin and Frank Yellin for explaining the rules
  for jahrzeits.

+ MINOR ENHANCEMENTS:

- Allowed the default page size used by Rem2PS to be selected in config.h

- Edited the defs.rem file to contain Jewish holidays.  Cleaned up some
  of the examples and improved the layout - thanks to George M. Sipe.

- Modified the IIF function to be more general

- Updated finnish.h to support the ISO 8859-1 character set, courtesy
  of Mikko Silvonen.

- Changed the date conversion routines to greatly speed up conversion from
  Days-since-epoch to yyyy/mm/dd form.

+ BUG FIXES:

- Fixed a bug in which Remind complained incorrectly about a missing quote
  in the command SET foo ""

- Fixed bugs in dosubst.c which caused the %o, %1 and %@ substitutions
  to be incorrect

- Fixed a bug in the man page - thanks to Ed Oskiewicz.

* VERSION 03.00.04 - 1993-03-08

- Added the -g option - this sorts reminders by date/time before
  issuing them.  (You can see I'm running out of letters to
  name options!)  This feature was suggested by George M. Sipe,
  Paul D. Smith, and Francois Pinard.

- Added the "args()" and "dosubst()" built-in functions - see the
  man page for details.

- Added more support for the ISO 8859-1 character set, and
  modified the german.h file to take advantage of this, thanks
  to Robert Joop.

- Allowed any character to be used as date and time separator
  characters (not just "/-:.")

- Added support for the Dutch and Finnish languages, thanks to
  Willem Kasdorp and Mikko Silvonen.  (Anyone care to contribute
  French?  Italian?  Spanish?)

- Made Remind issue a warning if you try to redefine a built-in
  function.  This warning is disabled in 'Hush' mode.

- Added the SCANFROM clause to the REM command.  This allows reasonably
  safe moveable OMITs such as the Labour Day example in the manual.

- Added more examples to the defs.rem file, and cleaned up some old
  examples.  Note that there are now safe moveable holidays for most
  U.S. holidays provided in the defs.rem file.

- Added the '-k' option, which allows MSG-type reminders to be passed
  to any system command.  (Idea and patch courtesy of Philipp Slusallek.)

- Allowed selection of ':' or '.' as time separator characters at
  compile-time.

- Edited the COPYRIGHT file to clarify the rules.  Please read them.

- Removed hard-coding of "am" and "pm" and placed them in language-specific
  header files as #defines L_AM and L_PM

- Fixed a bug in the FindToken() routine which had, through sheer luck,
  never been activated until the SCANFROM clause was added!

- Fixed the UNTIL clause to check for a valid expiry date.

- Removed identifiers in the C source beginning with "_" to conform
  to ANSI practice.

- Fixed a bug in the -u option which resulted in environment variables
  SHELL and USER not being set correctly.  Also made -u set the LOGNAME
  environment variable.

- Fixed a couple of typos in the man page; added LDFLAGS to the
  Makefile.  (Thanks to Dave Wolfe.)

- Put my new mailing address in the README files.

* VERSION 03.00.03 - 1993-02-21

- Corrected bugs in Remind and Rem2PS.  No new features added.  You
  should NOT use patch level 2 - either stick to 3.0.1 or upgrade to
  3.0.3.

* VERSION 03.00.02 - 1993-02-04

- Added the -u option to Remind so that root can run it as any user.
  This simplifies the remind-all scripts, and makes them more efficient.
  If you are worried that this option is a security hole, you can
  disable it in config.h

- Changed the RUN command so that RUN OFF can be used anywhere, even
  though RUN ON only works in the top-level file.  This eases the
  management of global files which may want to switch RUN OFF.

- Added ISO encoding (ISO 8859-1) to the PostScript output, courtesy of
  Michael Salmon.  This can be selected with the '-i' option in rem2ps.

- Added support for the '-' date separator as well as the '/' separator.

- Added support for languages other than English.  Note that this support
  is not complete - error messages are still in English.  The idea and
  German translation came from Wolfgang Thronicke.

- Changed the -w option to include the "padding" and "spacing" options.
  NOTE INCOMPATIBILITY:  In the previous patch level, creating a weekly
  calendar using the -c+n option left no blank lines between the day
  number and the first reminder entry.  This has been changed so that one
  blank line is left.  To revert to the old behaviour, use the "-w,,0"
  option.

- Added the -o option to Rem2ps.  This allows you to specify the margins
  when producing a PostScript calendar.

- Updated the copyright notices in all the files. :-)

- Added 'make clobber' and 'make test' targets to the Unix makefile.

- Corrected typos in WHATSNEW.30 and remind.1 man page.  Thanks to
  Dave Wolfe <dwolfe@pffft.sps.mot.com>

- Changed Remind so that supplying the -a option causes timed reminders
  not to be placed into the calendar in calendar mode.

* VERSION 03.00.01 - 1992-12-18

- Wrote the Rem2ps program to produce PostScript calendars

- Added an 'install' target to the Makefile

- Fixed a bug which allowed the shell() function to execute in timed
  reminders which were queued with RUN disabled.

- Added support for OS/2, courtesy of DARREL HANKERSON
  <HANK@DUCVAX.AUBURN.EDU>

- In expressions, can now specify literal dates as 'yyyy/mm/dd' rather than
  using the date() function.

- Fixed all the source files to include "config.h" first.

- Changed the way triggers are calculated so that trigger dates are
  always valid if year, month and day are specified, and there is no
  UNTIL clause.  See MAN page section "DETAILS ABOUT TRIGVALID()."

- Defined _POSIX_SOURCE so Remind will compile on SGI workstations (and
  be more portable... I hope.)

- Fixed some rather brain-dead definitions of UPPER and LOWER, as pointed
  out by <rsalz@osf.org>

- Added more details to the Man page concerning how triggers are computed,
  and added warnings about computing OMIT dates.

- Added the file defs.rem which contains examples of useful definitions and
  triggers.

- Changed the script test-rem to be a sh script instead of csh for improved
  portability.

- Fixed up the README.* files to reflect the changes.

- Re-formatted the WHATSNEW.30 file.

* VERSION 03.00.00 - 1992-11-09

- Total rewrite from previous versions

- Added variables, expressions, flow-control statements, daemon mode

- Added "expression pasting"

- Added CAL-type reminders

- Added the SATISFY clause

- Improved debugging of reminder scripts

- Took out the "purge" option - it is in general too difficult to tell when
  a reminder has expired for good, so now it's up to you to do this
  by hand.

- Fixed a lurking bug in trigger date calculation which, amazingly, had not
  been caught in the couple of years that Remind has been out!

* VERSION 02.03.05 - 1992-04-11

- Added the "c+n" option for printing a calendar by
  weeks instead of months, courtesy Dennis Cottel (dennis@peanuts.nosc.mil).

* VERSION 02.03.04 - 1991-11-06

- Made the init.c file nicer.  Made the Makefile
  prettier.  Added "make test", "make tar" and "make shar" Makefile targets.

* VERSION 02.03.03 - 1991-09-11

- Added a command-line option for Remind to process
  queued reminders in the foreground.  This makes automatic termination
  of Remind processes from within X-Windows and Sunview easier.

* VERSION 02.03.02 - 1991-07-19

- Fixed up a problem with timed reminders which resulted
  in cursor not starting from left side of screen on some systems.

- Fixed the SIGINT handler for SYSV systems - this was interrupting the
  sleep(2) system call.

- Closed stdin and stdout if remind was part of a pipe - this prevents other
  sections of the pipe from hanging as remind puts itself in the background.

- Added the "-h" (Hush mode) option

- Added the "%#" and "%@" modifiers for the current time.

- Made the Makefile more portable

* VERSION 02.03.01 - 1991-03-08

- Added the "-t" command-line option to get Remind
  to trigger all non-expired reminders.

- Added Turbo C support courtesy of Rhys Weatherly

- Added the "RUN ON" and "RUN OFF" commands for a secure interface with
  the Elm mail system.

- Added the "rem" shell script for running Remind with a default script.

- Added manual pages for "kall" and "rem".

* VERSION 2.3 - 1991-02-20

- Added the UNTIL keyword for forcing reminders to expire.

- Added the "++" form of 'back' and the "--" form of 'delta' for
  ignoring OMIT information.

- Added the CLEAR-OMIT-CONTEXT, PUSH-OMIT-CONTEXT and POP-OMIT-CONTEXT
  keywords for isolating personal or peculiar reminders from the global
  OMIT context.

- Speeded up the parsing of tokens.

- Changed the source to recognize and exploit ANSI-C compilers which
  accept function prototypes.

- Added the "-n" option to output the next occurrence of each reminder
  in SimpleCalendar format

- Modified the calendar and SimpleCalendar formats so that the % escape
  substitutions ARE performed.

* VERSION 02.02.05 - 1990-12-03

- Added the BEFORE, AFTER and SKIP tokens to make the
  handling of holidays more sensible.  Also corrected a few more bugs.

* VERSION 02.02.03 - 1990-11-28

- Added the MSG or RUN tokens in an OMIT command; also
  allowed RUN-type reminders to be explicitly included in the calendar by
  using the %" escape sequence.

* VERSION 2.2 - 1990-11-16

- Added the AT keyword, the timed reminders daemon, and the
  calendar facility.

* VERSION 2.1 - 1990-11-06

- Added the "repeat" token for repeating reminders with a period
  other than 7 days.  Also fixed some bugs from version 2.0

* VERSION 2.0 - 1990-11-01

- first public release.  Included advanced date specifications,
  character substitution, and the RUN keyword.

* VERSION 1.0

- never publicly released.
