calendar(1)
NAME
calendar − calendar reminder service
SYNTAX
calendar [−]
DESCRIPTION
The calendar command consults the file ‘calendar’ in the current directory and prints out lines that contain today’s or tomorrow’s date anywhere in the line. Most reasonable month-day dates such as ‘Dec. 7,’ ‘december 7,’ ‘12/7,’ etc., are recognized, but not ‘7 December’ or ‘7/12’. If you give the month as “*” with a date, that is, “* 1”, that day in any month will do. On weekends ‘tomorrow’ extends through Monday.
When an 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 mail1. Normally this is done daily in the wee hours under control of cron8.
The file ‘calendar’ is first run through the “C” preprocessor, /lib/cpp, to include any other calendar files specified with the usual “#include” syntax. Included calendars will usually be shared by all users, maintained and documented by the local administration.
OPTIONS
−Functions for every user who has a calendar file in his login directory.
RESTRICTIONS
The calendar’s extended idea of ‘tomorrow’ doesn’t account for holidays.
FILES
calendar
/usr/lib/calendar to figure out today’s and tomorrow’s dates
/etc/passwd
/tmp/cal*
/lib/cpp, egrep, sed, mail as subprocesses