CAL(1) BSD General Commands Manual CAL(1)


cal − displays a calendar


cal [−mjy] [month [year]]


Cal displays a simple calendar. If arguments are not specified, the current month is displayed. The options are as follows:

      −m’        Display Monday as the first day of the week.  (The default isSunday.)

−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.) Ten days following that date were eliminated by the reformation, so the calendar for that month is a bit unusual.


A cal command appeared in Version 6 AT&T UNIX.

BSD June 6, 1993 BSD