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

NAME
     calendar — reminder service

SYNOPSIS
     calendar [-ab] [-A num] [-B num] [-l num] [-w num] [-f calendarfile] [-t
	      [[[cc]yy]mm]dd]

DESCRIPTION
     The calendar utility checks the current directory or the directory speci‐
     fied by the CALENDAR_DIR environment variable for a file named calendar
     and displays lines that begin with either today's date or tomorrow's.  On
     Fridays, events on Friday through Monday are displayed.

     The options are as follows:

     -A num  Print lines from today and next num days (forward, future).
	     Defaults to one. (same as -l)

     -a	     Process the “calendar” files of all users and mail the results to
	     them.  This requires superuser privileges.

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

     -b	     Enforce special date calculation mode for KOI8 calendars.

     -l num  Print lines from today and next num days (forward, future).
	     Defaults to one. (same as -A)

     -w num  Print lines from today and next num days, only if today is Friday
	     (forward, future). Defaults to two, which causes calendar to
	     print entries through the weekend on Fridays.

     -f calendarfile
	     Use calendarfile as the default calendar file.

     -t [[[cc]yy]mm]dd
	     Act like the specified value is “today” instead of using the cur‐
	     rent date.	 If yy is specified, but cc is not, a value for yy
	     between 69 and 99 results in a cc value of 19.  Otherwise, a cc
	     value of 20 is used.

     To handle calendars in your national code table you can specify
     “LANG=<locale_name>” in the calendar file as early as possible.  To han‐
     dle national Easter names in the calendars, “Easter=<national_name>” (for
     Catholic Easter) or “Paskha=<national_name>” (for Orthodox Easter) can be
     used.

     A special locale name exists: ‘utf-8’.  Specifying “LANG=utf-8” indicates
     that the dates will be read using the C locale, and the descriptions will
     be encoded in UTF-8.  This is usually used for the distributed calendar
     files.  The “CALENDAR” variable can be used to specify the style.	Only
     ‘Julian’ and ‘Gregorian’ styles are currently supported.  Use “CALENDAR=”
     to return to the default (Gregorian).

     To enforce special date calculation mode for Cyrillic calendars you
     should specify “LANG=<local_name>” and “BODUN=<bodun_prefix>” where
     <local_name> can be ru_RU.KOI8-R, uk_UA.KOI8-U or by_BY.KOI8-B.

     Note that the locale is reset to the user's default for each new file
     that is read. This is so that locales from one file do not accidentally
     carry over into another 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 proper
     locale is set, national months and weekdays 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.	“Easter” (may be followed by a posi‐
     tive or negative integer) is Easter for this year.	 “Paskha” (may be fol‐
     lowed by a positive or negative integer) is Orthodox Easter for this
     year.  Weekdays may be followed by “-4” ... “+5” (aliases 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 isn't printed out.	 If
     the first character in the line is a <tab> character, it is treated as
     the continuation of the previous description.

     The calendar file is preprocessed by cpp(1), allowing the inclusion of
     shared files such as 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 directory /etc/calendar,
     and finally in /usr/share/calendar.  Empty lines and lines protected by
     the C commenting syntax (/* ... */) are ignored.

     Some possible calendar entries (a \t sequence denotes a <tab> character):

	   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.

	   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	   Directory in the user's home directory (which
			   calendar changes into, if it exists).
     ~/.calendar/calendar  File to use if no calendar file exists in the cur‐
			   rent directory.
     ~/.calendar/nomail	   calendar will not send mail if this file exists.
     calendar.all	   International and national calendar files.
     calendar.birthday	   Births and deaths of famous (and not-so-famous)
			   people.
     calendar.christian	   Christian holidays (should be updated yearly by the
			   local system administrator so that roving holidays
			   are set correctly for the current year).
     calendar.computer	   Days of special significance to computer people.
     calendar.croatian	   Croatian calendar.
     calendar.discord	   Discordian calendar (all rites reversed).
     calendar.fictional	   Fantasy and fiction dates (mostly LOTR).
     calendar.french	   French calendar.
     calendar.german	   German calendar.
     calendar.history	   Miscellaneous history.
     calendar.holiday	   Other holidays (including the not-well-known,
			   obscure, and really obscure).
     calendar.judaic	   Jewish holidays (should be updated yearly by the
			   local system administrator so that roving holidays
			   are set correctly for the current year).
     calendar.music	   Musical events, births, and deaths (strongly ori‐
			   ented toward rock n' roll).
     calendar.openbsd	   OpenBSD related events.
     calendar.pagan	   Pagan holidays, celebrations and festivals.
     calendar.russian	   Russian calendar.
     calendar.space	   Cosmic history.
     calendar.ushistory	   U.S. history.
     calendar.usholiday	   U.S. holidays.
     calendar.world	   World wide calendar.

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

STANDARDS
     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.

COMPATIBILITY
     The calendar command will only display lines that use a <tab> character
     to separate the date and description, or that begin with a <tab>. This is
     different than in previous releases.

     The -t flag argument syntax is from the original FreeBSD calendar pro‐
     gram.

     The -l and -w flags are Debian-specific enhancements. Also, the original
     calendar program did not accept 0 as an argument to the -A flag.

     Using ‘utf-8’ as a locale name is a Debian-specific enhancement.

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

BUGS
     calendar doesn't handle all Jewish holidays or moon phases.

BSD			      September 20, 2018			   BSD
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