.TH CALENDAR 1
.SH NAME
calendar \- reminder service
.SH SYNOPSIS
\fBcalendar [\fB\-\fR] [\fB\-r\fR]\fR
.br
.de FL
.TP
\\fB\\$1\\fR
\\$2
..
.de EX
.TP 20
\\fB\\$1\\fR
# \\$2
..
.SH OPTIONS
.FL "\-" "Work for every user and send mail to him"
.FL "\-r" "Restrict multiple execution on the same day"
.SH EXAMPLES
.EX "calendar" "Check \fIcalendar\fR file in current directory"
.EX "calendar" "Normary used under the control of cron(8)"
.EX "calendar \-r" " Normary used in /etc/rc file"
.SH DESCRIPTION
.PP
Basically \fIcalendar\fR program consults the file \fIcalendar\fR in the 
current directory and display lines which contain today's or tomorrow's date.
Month-day formats such
as '12/25', 'Dec. 25', 'december 25', '*/25', '12/*', '*/*' are
recognized.  The asterisk
means 'all' days or 'all' months.  On weekends 'tomorrow' extends through 
next Monday without any consideration about holidays.
To prevent ambiguity, the formats '25 Dec.' and '25/12' are not recognized.
.PP
When an argument \fB\-\fR is present, \fIcalendar\fR works for all users
with a file \fIcalendar\fR in their login directories and sends them mail.
Normally this is done daily under the control of \fIcron\fR.
.PP
The \fB\-r\fR option does its the same job as \fB\-\fR option, but touches
the \fIcalendar\fR to prevents further access on the same day.
Normally this is done in the \fI/etc/rc\fR file on a machine  which may be
booted several times in one day.
.SH "SEE ALSO"
.BR cron (8).