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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.\" Redistribution and use in source and binary forms, with or without
8.\" modification, are permitted provided that the following conditions
9.\" are met:
10.\" 1. Redistributions of source code must retain the above copyright
11.\" notice, this list of conditions and the following disclaimer.
12.\" 2. Redistributions in binary form must reproduce the above copyright
13.\" notice, this list of conditions and the following disclaimer in the
14.\" documentation and/or other materials provided with the distribution.
15.\" 3. All advertising materials mentioning features or use of this software
16.\" must display the following acknowledgement:
17.\" This product includes software developed by the University of
18.\" California, Berkeley and its contributors.
19.\" 4. Neither the name of the University nor the names of its contributors
20.\" may be used to endorse or promote products derived from this software
21.\" without specific prior written permission.
22.\"
23.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33.\" SUCH DAMAGE.
34.\"
35.\" @(#)cal.1 8.1 (Berkeley) 6/6/93
36.\"
37.Dd June 6, 1993
38.Dt CAL 1
39.Os
40.Sh NAME
41.Nm cal
42.Nd displays a calendar
43.Sh SYNOPSIS
44.Nm cal
ffc43748 45.Op Fl smjy13
364cda48 46.Op [ Ar month ] Ar year
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47.Sh DESCRIPTION
48.Nm Cal
49displays a simple calendar.
50If arguments are not specified,
51the current month is displayed.
52The options are as follows:
53.Bl -tag -width Ds
66ee8158 54.It Fl 1
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55Display single month output.
56(This is the default.)
66ee8158 57.It Fl 3
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58Display prev/current/next month output.
59.It Fl s
60Display Sunday as the first day of the week.
61(This is the default.)
5c36a0eb 62.It Fl m
eb63b9b8 63Display Monday as the first day of the week.
6dbe3af9 64.It Fl j
eb63b9b8 65Display Julian dates (days one-based, numbered from January 1).
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66.It Fl y
67Display a calendar for the current year.
68.El
69.Pp
70A single parameter specifies the year (1 - 9999) to be displayed;
71note the year must be fully specified:
72.Dq Li cal 89
73will
74.Em not
75display a calendar for 1989.
76Two parameters denote the month (1 - 12) and year.
77If no parameters are specified, the current month's calendar is
78displayed.
79.Pp
80A year starts on Jan 1.
81.Pp
82The Gregorian Reformation is assumed to have occurred in 1752 on the 3rd
83of September.
84By this time, most countries had recognized the reformation (although a
85few did not recognize it until the early 1900's.)
86Ten days following that date were eliminated by the reformation, so the
87calendar for that month is a bit unusual.
88.Sh HISTORY
89A
90.Nm
91command appeared in Version 6 AT&T UNIX.
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92.Sh OTHER VERSIONS
93Several much more elaborate versions of this program exist,
94with support for colors, holidays, birthdays, reminders and
95appointments, etc. For example, try the cal from
96http://home.sprynet.com/~cbagwell/projects.html
97or GNU gcal.
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98.Sh AVAILABILITY
99The cal command is part of the util-linux-ng package and is available from
100ftp://ftp.kernel.org/pub/linux/utils/util-linux-ng/.