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82 lines
3.0 KiB
Groff
82 lines
3.0 KiB
Groff
.\" Copyright (c) 1989, 1990, 1993
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" This code is derived from software contributed to Berkeley by
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.\" Kim Letkeman.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgement:
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.\" This product includes software developed by the University of
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.\" California, Berkeley and its contributors.
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.\" 4. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" @(#)cal.1 8.1 (Berkeley) 6/6/93
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.\"
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.Dd June 6, 1993
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.Dt CAL 1
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.Os
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.Sh NAME
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.Nm cal
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.Nd displays a calendar
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.Sh SYNOPSIS
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.Nm cal
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.Op Fl jy
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.Op Ar month Op Ar year
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.Sh DESCRIPTION
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.Nm Cal
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displays a simple calendar.
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If arguments are not specified,
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the current month is displayed.
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The options are as follows:
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.Bl -tag -width Ds
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.It Fl j
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Display julian dates (days one-based, numbered from January 1).
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.It Fl y
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Display a calendar for the current year.
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.El
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.Pp
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A single parameter specifies the year (1 - 9999) to be displayed;
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note the year must be fully specified:
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.Dq Li cal 89
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will
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.Em not
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display a calendar for 1989.
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Two parameters denote the month (1 - 12) and year.
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If no parameters are specified, the current month's calendar is
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displayed.
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.Pp
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A year starts on Jan 1.
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.Pp
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The Gregorian Reformation is assumed to have occurred in 1752 on the 3rd
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of September.
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By this time, most countries had recognized the reformation (although a
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few did not recognize it until the early 1900's.)
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Ten days following that date were eliminated by the reformation, so the
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calendar for that month is a bit unusual.
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.Sh HISTORY
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A
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.Nm
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command appeared in Version 6 AT&T UNIX.
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