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  direc-
                         tory

     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 con-
     sideration about holidays.  To prevent ambiguity,  the  for-
     mats '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).