1.\" $NetBSD: cal.1,v 1.9 2001/12/01 16:43:09 wiz Exp $ 2.\" 3.\" Copyright (c) 1989, 1990, 1993 4.\" The Regents of the University of California. All rights reserved. 5.\" 6.\" This code is derived from software contributed to Berkeley by 7.\" Kim Letkeman. 8.\" 9.\" Redistribution and use in source and binary forms, with or without 10.\" modification, are permitted provided that the following conditions 11.\" are met: 12.\" 1. Redistributions of source code must retain the above copyright 13.\" notice, this list of conditions and the following disclaimer. 14.\" 2. Redistributions in binary form must reproduce the above copyright 15.\" notice, this list of conditions and the following disclaimer in the 16.\" documentation and/or other materials provided with the distribution. 17.\" 3. All advertising materials mentioning features or use of this software 18.\" must display the following acknowledgement: 19.\" This product includes software developed by the University of 20.\" California, Berkeley and its contributors. 21.\" 4. Neither the name of the University nor the names of its contributors 22.\" may be used to endorse or promote products derived from this software 23.\" without specific prior written permission. 24.\" 25.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35.\" SUCH DAMAGE. 36.\" 37.\" @(#)cal.1 8.2 (Berkeley) 4/28/95 38.\" 39.Dd April 28, 1995 40.Dt CAL 1 41.Os 42.Sh NAME 43.Nm cal 44.Nd displays a calendar 45.Sh SYNOPSIS 46.Nm 47.Op Fl jy 48.Op Oo Ar month Oc Ar \ year 49.Sh DESCRIPTION 50.Nm 51displays a simple calendar. 52If arguments are not specified, 53the current month is displayed. 54The options are as follows: 55.Bl -tag -width Ds 56.It Fl j 57Display julian dates (days one-based, numbered from January 1). 58.It Fl y 59Display a calendar for the current year. 60.El 61.Pp 62A single parameter specifies the year (1 - 9999) to be displayed; 63note the year must be fully specified: 64.Dq Li cal 89 65will 66.Em not 67display a calendar for 1989. 68Two parameters denote the month (1 - 12) and year. 69If no parameters are specified, the current month's calendar is 70displayed. 71.Pp 72A year starts on Jan 1. 73.Pp 74In the USA and Great Britain the Gregorian Reformation occurred in 1752. 75By this time, most countries had recognized the reformation (although a 76few did not recognize it until the early 1900's.) 77Eleven days following September 2, 1752 were eliminated by the reformation, 78so the calendar for that month is a bit unusual. 79.Sh NOTE 80In view of the chaotic way the Gregorian calendar was adopted throughout 81the world in the years between 1582 and 1923 make sure to take into account 82the date of the Gregorian Reformation in your region if you are checking a 83calendar for a very old date. 84.Sh HISTORY 85A 86.Nm 87command appeared in 88.At v6 . 89