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+.\"	$NetBSD: cal.1,v 1.6 1995/09/02 05:34:20 jtc Exp $
+.\"
+.\" Copyright (c) 1989, 1990, 1993
+.\"	The Regents of the University of California.  All rights reserved.
+.\"
+.\" This code is derived from software contributed to Berkeley by
+.\" Kim Letkeman.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"	This product includes software developed by the University of
+.\"	California, Berkeley and its contributors.
+.\" 4. Neither the name of the University nor the names of its contributors
+.\"    may be used to endorse or promote products derived from this software
+.\"    without specific prior written permission.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\"     @(#)cal.1	8.2 (Berkeley) 4/28/95
+.\"
+.Dd April 28, 1995
+.Dt CAL 1
+.Os
+.Sh NAME
+.Nm cal
+.Nd displays a calendar
+.Sh SYNOPSIS
+.Nm cal
+.Op Fl jy
+.Op Oo Ar month Oc Ar \ year
+.Sh DESCRIPTION
+.Nm Cal
+displays a simple calendar.
+If arguments are not specified,
+the current month is displayed.
+The options are as follows:
+.Bl -tag -width Ds
+.It Fl j
+Display julian dates (days one-based, numbered from January 1).
+.It Fl y
+Display a calendar for the current year.
+.El
+.Pp
+A single parameter specifies the year (1 - 9999) to be displayed;
+note the year must be fully specified:
+.Dq Li 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 in 1752 on the 3rd
+of September.
+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 
+.At v6 .