1.\" Copyright (c) 1989, 1990, 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" This code is derived from software contributed to Berkeley by 5.\" Kim Letkeman. 6.\" 7.\" %sccs.include.redist.man% 8.\" 9.\" @(#)cal.1 8.2 (Berkeley) 04/28/95 10.\" 11.Dd 12.Dt CAL 1 13.Os 14.Sh NAME 15.Nm cal 16.Nd displays a calendar 17.Sh SYNOPSIS 18.Nm cal 19.Op Fl jy 20.Op Oo Ar month Oc Ar \ year 21.Sh DESCRIPTION 22.Nm Cal 23displays a simple calendar. 24If arguments are not specified, 25the current month is displayed. 26The options are as follows: 27.Bl -tag -width Ds 28.It Fl j 29Display julian dates (days one-based, numbered from January 1). 30.It Fl y 31Display a calendar for the current year. 32.El 33.Pp 34A single parameter specifies the year (1 - 9999) to be displayed; 35note the year must be fully specified: 36.Dq Li cal 89 37will 38.Em not 39display a calendar for 1989. 40Two parameters denote the month (1 - 12) and year. 41If no parameters are specified, the current month's calendar is 42displayed. 43.Pp 44A year starts on Jan 1. 45.Pp 46The Gregorian Reformation is assumed to have occurred in 1752 on the 3rd 47of September. 48By this time, most countries had recognized the reformation (although a 49few did not recognize it until the early 1900's.) 50Ten days following that date were eliminated by the reformation, so the 51calendar for that month is a bit unusual. 52.Sh HISTORY 53A 54.Nm 55command appeared in Version 6 AT&T UNIX. 56