[Remind-Fans] Fun remind(1) trick for vacation itineraries

[Tim Chase]

I recently had some vacation plans to put on my calendar, but had
an issue where I wanted different info depending on whether it was
the calendar view (`-c`) or the agenda view.

Of course, remind to the rescue:

  IF $CalMode
    REM AUG 8 2024 THROUGH Aug 31 2024 MSG Vacation
  ELSE
    REM Aug 24 2024 AT 6:00am DURATION 5:00 \
      MSG Flight 3141 to HI %b (itinerary C0FF33)
    REM Aug 25 2024 AT 10:00am MSG See volcano %b
    REM Aug 25 2024 AT 1:00pm MSG Hang-gliding %b
    REM Aug 26 2024 AT 6:00pm MSG Luau %b
    REM Aug 27 2024 AT 9:30am MSG Diving %b
    REM Aug 28 2024 3:00pm MSG Pearl Harbor %b
    REM Aug 29 2024 AT 10:00am MSG Surf lessons %b
    REM Aug 30 2024 MSG Rest & relax
    REM Aug 31 2024 AT 5:00am DURATION 5:00 \
      MSG Flight 1415 home %b
  ENDIF

That way, the calendar-view had simple entries each day, while the
agenda view had all the details of each day (much longer reminders
with times on events, multiple events per day, hotel/car reservation
numbers, flight numbers, etc).  So it wasn't as simple as using the

  REM ... MSG %"Cal text%" with details

syntax.

I can't even imagine how I'd go about doing something like this in
other calendar programs.

Sharing in case it's useful for someone else.

-tim

PS: fake vacation events here, not our actual vacation :-)