cal - displays a calendar
cal [-jy] [[month] year]
Cal displays a simple calendar. If arguments are not specified, the current month is displayed. The options are as follows:
-j Display julian dates (days one-based, numbered from January 1).
-y Display a calendar for the current year.
A single parameter specifies the year (1 - 9999) to be displayed; note the year must be fully specified: ``cal 89'' will not display a calendar for 1989. Two parameters denote the month (1 - 12) and year. If no parameters are specified, the current month's calendar is displayed.
A year starts on Jan 1.
The Gregorian Reformation is assumed to have occurred in 1752 on the 3rd of September. By this time, most countries had recognized the reformation (although a few did not recognize it until the early 1900's.) Eleven days following that date were eliminated by the reformation, so the calendar for that month is a bit unusual.
The cal command offers a superset of IEEE Std1003.2 (``Posix.2'') functionality.
A cal command appeared in Version 6 AT&T Unix.
Greg Hewgill email@example.com 1999-03-01
This program is copyright by Greg Hewgill 1999.
This program is free and open software. You may use, copy, modify, distribute and sell this program (and any modified variants) in any way you wish, provided you do not restrict others to do the same.