CAL(1) BSD General Commands Manual CAL(1)NAMEcal — displays a calendar
SYNOPSIScal [-jy] [[month] year]
Cal displays a simple calendar. If arguments are not specified, the cur‐
rent 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 reforma‐
tion (although a few did not recognize it until the early 1900's.) Ten
days following that date were eliminated by the reformation, so the cal‐
endar for that month is a bit unusual.
A cal command appeared in Version 6 AT&T UNIX.
BSD April 28, 1995 BSD