.\" Copyright (c) 1989 The Regents of the University of California.
.\" Redistribution and use in source and binary forms are permitted
.\" provided that the above copyright notice and this paragraph are
.\" duplicated in all such forms and that any documentation,
.\" advertising materials, and other materials related to such
.\" distribution and use acknowledge that the software was developed
.\" by the University of California, Berkeley. The name of the
.\" University may not be used to endorse or promote products derived
.\" from this software without specific prior written permission.
.\" THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
.\" IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
.\" WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
.\" @(#)calendar.1 6.7 (Berkeley) %G%
calendar \- reminder service
reads the file ``calendar'' in the current directory and displays lines
that begin with either today's or tomorrow's date.
On Fridays, events on Friday through Monday are displayed.
The following options are available:
Process the ``calendar'' files of all users and mail the results
This requires super-user privileges.
A month and day should begin lines.
They may be entered in almost any format, either numeric or as character
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.
By convention, dates followed by an asterisk are not fixed, i.e. change
The ``calendar'' file is preprocessed by
allowing the inclusion of shared files such as company holidays or
If the shared file is not referenced by a full pathname,
searches in the current (or home) directory first, and then in the
.IR /usr/share/calendar .
Empty lines and lines protected by the C commenting syntax (/* ... */)
Some possible calendar entries:
#include <calendar.usholiday>
#include <calendar.birthday>
6/15 ... June 15 (if ambiguous, will default to month/day).
Thursday ... Every Thursday.
15 * ... 15th of every month.
The following default calendar files are provided:
Births and deaths of famous (and not-so-famous) people.
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.
Everything else, mostly U.S. historical events.
Other holidays, including the not-well-known, obscure, and
This calendar 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 oriented toward rock 'n' roll.
This calendar should be updated yearly by the local system administrator
so that roving holidays are set correctly for the current year.
at(1), cpp(1), mail(1), cron(8)
program previously selected lines which had the correct date anywhere
This is no longer true, the date is only recognized when it occurs
doesn't handle events that move around from year to year, i.e.
``the last Monday in April''.