NAME
cal - displays a calendar

SYNOPSIS
cal [-smjy13] [[month] year]

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

-1 Display single month output. (This is the default.)

-3 Display prev/current/next month output.

-s Display Sunday as the first day of the week. (This is the default.)

-m Display Monday as the first day of the week.

-j Display Julian dates (days one-based, numbered from January 1).

-y Display a calendar for the current year.

-V Display version information and exit.

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 cal-
endar 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 recog-
nized 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.

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

OTHER VERSIONS
Several much more elaborate versions of this program exist, with support for colors, holidays, birthdays, reminders and appoint-
ments, etc. For example, try the cal from http://home.sprynet.com/~cbagwell/projects.html or GNU gcal.

AVAILABILITY
The cal command is part of the util-linux-ng package and is available from ftp://ftp.kernel.org/pub/linux/utils/util-linux-ng/.