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

     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.

     -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.

     -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
             current date.

     To handle calendars in your national code table you can specify
     ``LANG=<locale_name>'' in the calendar file as early as possible.  To
     handle 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'' indi-
     cates that the dates will be read using the C locale, and the descrip-
     tions 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
     year.  Weekdays may be followed by ``-4'' ... ``+5'' (aliases last,
     first, second, third, fourth) for moving events like ``the last Monday in

     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):


           #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
           Ostern-2\tGood Friday (2 days before Easter)
           Paskha\tOrthodox Easter

     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)
     calendar.christian    Christian holidays (should be updated yearly by the
                           local system administrator so that roving holidays
                           are set correctly for the current year).        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.        Cosmic history.
     calendar.ushistory    U.S. history.
     calendar.usholiday    U.S. holidays.        World wide calendar.

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

     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.

     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-

     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.

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

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

BSD                              May 28, 2017                              BSD
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