.\" Copyright (c) 1989, 1990 The Regents of the University of California.
.\" All rights reserved.
.\"
.\" This code is derived from software contributed to Berkeley by
.\" Kim Letkeman.
.\"
.\" %sccs.include.redist.man%
.\"
.\"     @(#)cal.1	6.6 (Berkeley) 06/11/90
.\"
.Dd 
.Dt CAL 1
.Os BSD 4.4
.Sh NAME
.Nm cal
.Nd displays a calendar
.Sh SYNOPSIS
.Nm cal
.Op Fl jy
.Op Ar month Op Ar year
.Sh DESCRIPTION
.Nm Cal
displays a simple calendar.
If no options or arguments are given,
.Nm cal
displays the current month.
The options are as follows:
.Tp Fl j
Display julian dates (days one-based, numbered from January 1).
.Tp Fl y
Display a calendar for the current year.
.Tp
.Pp
A single parameter specifies the year (1 - 9999) to be displayed;
note the year must be fully specified: ``cal 89'' will
.Em 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.
.Pp
A year starts on Jan 1.
.Pp
The Gregorian Reformation is assumed to have occurred on 3rd of September
in 1752.
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.
.Sh HISTORY
A
.Nm
command appeared in Version 6 AT&T UNIX.  The
.Nm
command this man page describes is
derived from code contributed by Kim Letkeman.