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

     calendar -- reminder service

     calendar [-ax] [-d MMDD[[YY]YY]] [-f file] [-l days] [-w days]

     The calendar utility processes text files and displays lines that match
     certain dates.

     The following options are available:

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

     -d MMDD[[YY]YY]
             Display lines for the given date.  By default, the current date
             is used.  The year, which may be given in either two or four
             digit format, is used only for purposes of determining whether
             the given date falls on a Friday in that year (see below).  If
             the year is not specified, the current year is assumed.

     -f file
             Display matching calendar files from the given filename.  By
             default, the following filenames are checked for:
             and the first which is found is used.  The filename may be
             absolute.  If not absolute, it is taken relative to the directory
             specified by the CALENDAR_DIR environment variable, if set;
             otherwise, it is taken relative to the user's home directory.
             Or, if the -a flag is given, a non-absolute filename is taken
             relative to each user's home directory in turn.

     -l days
             Causes the program to "look ahead" a given number of days
             (default one) from the specified date and display their entries
             as well.

     -w days
             Causes the program to add the specified number of days to the
             "look ahead" number if and only if the day specified is a Friday.
             The default value is two, which causes calendar to print entries
             through the weekend on Fridays.

     -x      Causes calendar not to set the CPP_RESTRICTED environment
             variable.  Passing this flag allows users the (somewhat obscure)
             option of including a named pipe via cpp(1)'s #include syntax,
             but opens up the possibility of calendar hanging indefinitely if
             users do so incorrectly.  For this reason, the -x flag should
             never be used with calendar -a.

     Lines should begin with a month and day.  They may be entered in almost
     any format, either numeric or as character strings.  A single asterisk
     ('*') matches every month, or every day if a month has been provided.
     This means that two asterisks ('**') matches every day of the year, and
     is thus useful for ToDo tasks.  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.  By convention, dates followed by an
     asterisk are not fixed, i.e., change from year to year.

     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 /usr/share/calendar.
     Empty lines and lines protected by the C commenting syntax (/* ... */)
     are ignored.

     Some possible calendar entries:

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

           6/15            ... June 15 (if ambiguous, will default to month/day).
           Jun. 15         ... June 15.
           15 June         ... June 15.
           Thursday        ... Every Thursday.
           June            ... Every June 1st.
           15 *            ... 15th of every month.
           *15             ... 15th of every month.
           June*           ... Every day of June.
           **              ... Every day

     The following default calendar files are provided:

     calendar.birthday   Births and deaths of famous (and not-so-famous)
     calendar.christian  Christian holidays.  This calendar should be updated
                         yearly by the local system administrator so that
                         roving holidays are set correctly for the current
                         year.   Days of special significance to computer people.
     calendar.history    Everything else, mostly U.S. historical events.    Other holidays, including the not-well-known,
                         obscure, and really obscure.
     calendar.judaic     Jewish holidays.  This calendar should be updated
                         yearly by the local system administrator so that
                         roving holidays are set correctly for the current
     calendar.lotr       Important dates in the Lord of the Rings series.      Musical events, births, and deaths.  Strongly
                         oriented toward rock 'n' roll.
     calendar.netbsd     Important dates in the history of the NetBSD project.
                         Mostly releases and port additions.
     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

     The calendar program previously selected lines which had the correct date
     anywhere in the line.  This is no longer true, the date is only
     recognized when it occurs first on the line.

     In NetBSD 3.0, the calendar command was modified to search the user's
     home directory instead of the current directory by default.  Users
     desiring the historical behavior should set the CALENDAR_DIR environment
     variable to ., or use the -f flag.

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

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

     calendar doesn't handle events that move around from year to year, i.e.,
     "the last Monday in April".

     The -a option ignores the user's CALENDAR_DIR environment variable.

BSD                             August 27, 2009                            BSD