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

NAME
     calendar — reminder service

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

DESCRIPTION
     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:
		   ~/calendar
		   ~/.calendar
		   /etc/calendar
	     and the first which is found is used.  The filename may be abso‐
	     lute.  If not absolute, it is taken relative to the directory
	     specified by the CALENDAR_DIR environment variable, if set; oth‐
	     erwise, it is taken relative to the user's home directory.	 Or,
	     if the -a flag is given, a non-absolute filename is taken rela‐
	     tive 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 vari‐
	     able.  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 specifica‐
     tions 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

FILES
     The following default calendar files are provided:

     calendar.birthday	 Births and deaths of famous (and not-so-famous) peo‐
			 ple.
     calendar.christian	 Christian holidays.  This calendar should be updated
			 yearly by the local system administrator so that rov‐
			 ing holidays are set correctly for the current year.
     calendar.computer	 Days of special significance to computer people.
     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.  This calendar should be updated
			 yearly by the local system administrator so that rov‐
			 ing holidays are set correctly for the current year.
     calendar.lotr	 Important dates in the Lord of the Rings series.
     calendar.music	 Musical events, births, and deaths.  Strongly ori‐
			 ented 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 rov‐
			 ing holidays are set correctly for the current year.

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 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 desir‐
     ing the historical behavior should set the CALENDAR_DIR environment vari‐
     able to ., or use the -f flag.

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

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

BUGS
     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
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