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CALENDAR(1)		  BSD General Commands Manual		   CALENDAR(1)

NAME
     calendar — reminder service

SYNOPSIS
     calendar [-a] [-A num] [-B num] [-F friday] [-f calendarfile]
	      [-t dd[.mm[.year]]] [-W num] [-U UTC-offset] [-l longitude]

DESCRIPTION
     The calendar utility checks the current directory for a file named
     calendar and displays lines that begin with either today's date or tomor‐
     row's.  On the day before a weekend (normally Friday), events for the
     next three days are displayed.

     The following options are available:

     -A num  Print lines from today and the next num days (forward, future).

     -a	     Process the ``calendar'' files of all users and mail the results
	     to them.  This requires super-user privileges.

     -B num  Print lines from today and the previous num days (backward,
	     past).

     -F friday
	     Specify which day of the week is ``Friday'' (the day before the
	     weekend begins).  Default is 5.

     -f calendarfile
	     Use calendarfile as the default calendar file.

     -t dd[.mm[.year]]
	     For test purposes only: set date directly to argument values.

     -l longitude, -U UTC-offset
	     Only one is needed: Perform lunar and solar calculations from
	     this longitude or from this UTC offset.  If neither is specified,
	     the calculations will be based on the difference between UTC time
	     and localtime.

     -W num  Print lines from today and the next num days (forward, future).
	     Ignore weekends when calculating the number of days.

FILE FORMAT
     To handle calendars in your national code table you can specify
     “LANG=<locale_name>” in the calendar file as early as possible.

     To handle the local name of sequences, you can specify them as:
     “SEQUENCE=<first> <second> <third> <fourth> <fifth> <last>” in the calen‐
     dar file as early as possible.

     The names of the following special days are recognized:
     Easter	      Catholic Easter.
     Paskha	      Orthodox Easter.
     NewMoon	      The lunar New Moon.
     FullMoon	      The lunar Full Moon.
     MarEquinox	      The solar equinox in March.
     JunSolstice      The solar solstice in June.
     SepEquinox	      The solar equinox in March.
     DecSolstice      The solar solstice in December.
     ChineseNewYear   The first day of the Chinese year.
     These names may be reassigned to their local names via an assignment like
     “Easter=Pasen” in the calendar file.

     Other lines should begin with a month and day.  They may be entered in
     almost any format, either numeric or as character strings.	 If the proper
     locale is set, national month and weekday names can be used.  A single
     asterisk (``*'') matches every month.  A day without a month matches that
     day of every week.	 A month without a day matches the first of that
     month.  Two numbers default to the month followed by the day.  Lines with
     leading tabs default to the last entered date, allowing multiple line
     specifications for a single date.

     The names of the recognized special days may be followed by a positive or
     negative integer, like: “Easter+3” or “Pashka-4”.

     Weekdays may be followed by ``-4'' ... ``+5'' (aliases for last, first,
     second, third, fourth) for moving events like ``the last Monday in
     April''.

     By convention, dates followed by an asterisk are not fixed, i.e., change
     from year to year.

     Day descriptions start after the first <tab> character in the line; if
     the line does not contain a <tab> character, it is not displayed.	If the
     first character in the line is a <tab> character, it is treated as a con‐
     tinuation of the previous line.

     The ``calendar'' file is preprocessed by cpp(1), allowing the inclusion
     of shared files such as lists of company holidays or meetings.  If the
     shared file is not referenced by a full pathname, cpp(1) searches in the
     current (or home) directory first, and then in the directory
     /usr/share/calendar.  Empty lines and lines protected by the C commenting
     syntax (/* ... */) are ignored.

     Some possible calendar entries (<tab> characters highlighted by \t
     sequence)

	   LANG=C
	   Easter=Ostern

	   #include <calendar.usholiday>
	   #include <calendar.birthday>

	   6/15\tJune 15 (if ambiguous, will default to month/day).
	   Jun. 15\tJune 15.
	   15 June\tJune 15.
	   Thursday\tEvery Thursday.
	   June\tEvery June 1st.
	   15 *\t15th of every month.
	   2010/4/15\t15 April 2010

	   May Sun+2\tsecond Sunday in May (Muttertag)
	   04/SunLast\tlast Sunday in April,
	   \tsummer time in Europe
	   Easter\tEaster
	   Ostern-2\tGood Friday (2 days before Easter)
	   Paskha\tOrthodox Easter

FILES
     calendar		 file in current directory
     ~/.calendar	 calendar HOME directory.  A chdir is done into this
			 directory if it exists.
     ~/.calendar/calendar
			 calendar file to use if no calendar file exists in
			 the current directory.
     ~/.calendar/nomail	 do not send mail if this file exists.

     The following default calendar files are provided in
     /usr/share/calendars:

     calendar.all	   File which includes all the default files.
     calendar.australia	   Calendar of events in Australia.
     calendar.birthday	   Births and deaths of famous (and not-so-famous)
			   people.
     calendar.christian	   Christian holidays.	This calendar should be
			   updated yearly by the local system administrator so
			   that roving holidays are set correctly for the cur‐
			   rent year.
     calendar.computer	   Days of special significance to computer people.
     calendar.croatian	   Calendar of events in Croatia.
     calendar.dutch	   Calendar of events in the Netherlands.
     calendar.freebsd	   Birthdays of FreeBSD committers.
     calendar.french	   Calendar of events in France.
     calendar.german	   Calendar of events in Germany.
     calendar.history	   Everything else, mostly U.S. historical events.
     calendar.holiday	   Other holidays, including the not-well-known,
			   obscure, and really obscure.
     calendar.judaic	   Jewish holidays.  The entries for this calendar
			   have been obtained from the port deskutils/hebcal.
     calendar.music	   Musical events, births, and deaths.	Strongly ori‐
			   ented toward rock 'n' roll.
     calendar.newzealand   Calendar of events in New Zealand.
     calendar.russian	   Russian calendar.
     calendar.southafrica  Calendar of events in South Africa.
     calendar.usholiday	   U.S. holidays.  This calendar should be updated
			   yearly by the local system administrator so that
			   roving holidays are set correctly for the current
			   year.
     calendar.world	   Includes all calendar files except for national
			   files.

COMPATIBILITY
     The calendar program previously selected lines which had the correct date
     anywhere in the line.  This is no longer true, the date is only recog‐
     nized when it occurs at the beginning of a line.

SEE ALSO
     at(1), cpp(1), mail(1), cron(8)

HISTORY
     A calendar command appeared in Version 7 AT&T UNIX.

NOTES
     Chinese New Year is calculated at 120 degrees east of Greenwich, which
     roughly corresponds with the east coast of China.	For people west of
     China, this might result that the start of Chinese New Year and the day
     of the related new moon might differ.

     The phases of the moon and the longitude of the sun are calculated
     against the local position which corresponds with 30 degrees times the
     time-difference towards Greenwich.

     The new and full moons are happening on the day indicated: They might
     happen in the time period in the early night or in the late evening.  It
     doesn't indicate that they are starting in the night on that date.

     Because of minor differences between the output of the formulas used and
     other sources on the Internet, Druids and Werewolves should double-check
     the start and end time of solar and lunar events.

BUGS
     The calendar utility does not handle Jewish holidays.

     There is no possibility to properly specify the local position needed for
     solar and lunar calculations.

BSD				 June 13, 2002				   BSD
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