# calendar(1)

## NAME

         calendar - reminder service

## SYNOPSIS

         calendar [-] [-r]

## OPTIONS

         -    Work for every user and send mail to him

         -r   Restrict multiple execution on the same day

## EXAMPLES

         calendar            # Check calendar file in current directory

         calendar            # Normary used under the control of cron(8)

         calendar -r         #  Normary used in /etc/rc file

## DESCRIPTION

         Basically calendar program consults the  file  calendar  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.

         When an argument - is present, calendar works for all users with  a  file
         calendar  in  their login directories and sends them mail.  Normally this
         is done daily under the control of cron.

         The -r option does its the same job as - option, but touches the calendar
         to prevents further access on the same day.  Normally this is done in the
         /etc/rc file on a machine  which may be booted several times in one day.

## SEE ALSO

         cron(8).