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CALENDAR(1)                 General Commands Manual                CALENDAR(1)

       calendar - a simple reminder service

       calendar [ - ]

       calendar  consults  the file calendar in the current directory and dis-
       plays lines that contain today's or tomorrow's  date  anywhere  in  the
       line.   Most  reasonable month-day dates -- such as `Dec. 7,' `december
       7,' and `12/7' -- are recognized, but `7 December' or `7/12'  are  not.
       If  you  give  the month as `*' with a date -- for example, ``*  1'' --
       that day in any month will do.  On weekends "tomorrow" extends  through

       When  the  optional  `-' argument is present, calendar does its job for
       every user who has a file calendar in his login directory and sends him
       any  positive  results  by mail(1).  Normally this is done daily in the
       wee hours under control of cron(8).

       The file calendar is first run through the C preprocessor,  cpp(1),  to
       include any other calendar files specified with the usual #include syn-
       tax.  Included calendars are usually shared by  all  users,  and  main-
       tained by the system administrator.

       /usr/lib/calendar   to figure out today's and tomorrow's dates

       at(1), cpp(1), grep(1V), mail(1), aliases(5), cron(8)

       The  `-'  argument  works  only on calendar files that are local to the
       machine; calendar is intended not to work on calendar  files  that  are
       mounted  remotely  with  NFS.  Thus, `calendar -' should be run only on
       diskful machines where home directories exist;  running it on  a  disk-
       less client has no effect.

       calendar is no longer in the default root crontab.  Because of the net-
       work burden `calendar -' can induce, it is inadvisable in  an  environ-
       ment  running  ypbind  (see  ypserv(8)) with a large passwd.byname map.
       However, if the usefulness of calendar outweighs  the  network  impact,
       the  super-user  may run `crontab -e' to edit the root crontab.  Other-
       wise, individual users may wish to use `crontab -e' to edit  their  own
       crontabs  to have cron invoke calendar without the `-' argument, piping
       output to mail addressed to themselves.

       calendar's extended idea of "tomorrow" does not account for holidays.

       Problems may occur when there is no /etc/passwd file on the local host.

       The calendar mail will be sent to the user  at  the  machine  on  which
       `calendar  -' is run.  If the system administrator wants the mail to be
       sent to another machine, mail aliases should be set up accordingly.

                                18 August 1989                     CALENDAR(1)