29e838d661
The ports version of cal is an abandonware so in order to minimize the potential bit rot of our documentation let's not mention it at all. Interested users are going to find suitable alternatives anyway on their own. Reported by: bapt Approved by: bapt (src) Approved by: krion (mentor, implicit), mat (mentor, implicit) Differential Revision: https://reviews.freebsd.org/D19492
205 lines
5.3 KiB
Groff
205 lines
5.3 KiB
Groff
.\" Copyright (c) 1997 Wolfgang Helbig
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.\" All rights reserved.
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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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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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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.\" $FreeBSD$
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.\"
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.Dd March 7, 2019
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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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.Nm ncal
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.Nd displays a calendar and the date of Easter
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.Sh SYNOPSIS
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.Nm
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.Op Fl 3hjy
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.Op Fl A Ar number
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.Op Fl B Ar number
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.Oo
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.Op Ar month
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.Ar year
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.Oc
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.Nm
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.Op Fl 3hj
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.Op Fl A Ar number
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.Op Fl B Ar number
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.Fl m Ar month
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.Op Ar year
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.Nm ncal
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.Op Fl 3hjJpwy
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.Op Fl A Ar number
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.Op Fl B Ar number
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.Op Fl s Ar country_code
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.Oo
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.Op Ar month
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.Ar year
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.Oc
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.Nm ncal
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.Op Fl 3hJeo
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.Op Fl A Ar number
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.Op Fl B Ar number
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.Op Ar year
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.Nm ncal
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.Op Fl CN
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.Op Fl H Ar yyyy-mm-dd
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.Op Fl d Ar yyyy-mm
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.Sh DESCRIPTION
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The
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.Nm
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utility displays a simple calendar in traditional format and
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.Nm ncal
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offers an alternative layout, more options and the date of Easter.
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The new format is a little cramped but it makes a year fit
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on a 25x80 terminal.
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If arguments are not specified,
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the current month is displayed.
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.Pp
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The options are as follows:
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.Bl -tag -width indent
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.It Fl h
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Turns off highlighting of today.
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.It Fl J
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Display Julian Calendar, if combined with the
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.Fl e
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option, display date of Easter according to the Julian Calendar.
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.It Fl e
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Display date of Easter (for western churches).
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.It Fl j
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Display Julian days (days one-based, numbered from January 1).
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.It Fl m Ar month
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Display the specified
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.Ar month .
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If
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.Ar month
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is specified as a decimal number, it may be followed by the letter
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.Ql f
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or
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.Ql p
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to indicate the following or preceding month of that number,
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respectively.
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.It Fl o
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Display date of Orthodox Easter (Greek and Russian
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Orthodox Churches).
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.It Fl p
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Print the country codes and switching days from Julian to Gregorian
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Calendar as they are assumed by
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.Nm ncal .
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The country code as determined from the local environment is marked
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with an asterisk.
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.It Fl s Ar country_code
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Assume the switch from Julian to Gregorian Calendar at the date
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associated with the
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.Ar country_code .
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If not specified,
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.Nm ncal
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tries to guess the switch date from the local environment or
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falls back to September 2, 1752.
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This was when Great
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Britain and her colonies switched to the Gregorian Calendar.
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.It Fl w
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Print the number of the week below each week column.
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.It Fl y
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Display a calendar for the specified year.
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.It Fl 3
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Display the previous, current and next month surrounding today.
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.It Fl A Ar number
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Display the
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.Ar number
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of months after the current month.
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.It Fl B Ar number
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Display the
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.Ar number
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of months before the current month.
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.It Fl C
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Switch to
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.Nm cal
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mode.
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.It Fl N
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Switch to
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.Nm ncal
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mode.
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.It Fl d Ar yyyy-mm
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Use
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.Ar yyyy-mm
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as the current date (for debugging of date selection).
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.It Fl H Ar yyyy-mm-dd
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Use
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.Ar yyyy-mm-dd
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as the current date (for debugging of highlighting).
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.El
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.Pp
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A single parameter specifies the year (1\(en9999) 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 and
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year; the month is either a number between 1 and 12, or a full or
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abbreviated name as specified by the current locale.
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Month and
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year default to those of the current system clock and time zone (so
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.Dq Li cal -m 8
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will display a calendar for the month of August in the current
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year).
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.Pp
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Not all options can be used together.
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For example
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.Dq Li -3 -A 2 -B 3 -y -m 7
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would mean:
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show me the three months around the seventh month, three before
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that, two after that and the whole year.
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.Nm ncal
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will warn about these combinations.
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.Pp
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A year starts on January 1.
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.Pp
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Highlighting of dates is disabled if stdout is not a tty.
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.Sh SEE ALSO
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.Xr calendar 3 ,
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.Xr strftime 3
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.Sh HISTORY
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A
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.Nm
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command appeared in
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.At v1 .
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The
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.Nm ncal
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command appeared in
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.Fx 2.2.6 .
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.Sh AUTHORS
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The
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.Nm ncal
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command and manual were written by
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.An Wolfgang Helbig Aq Mt helbig@FreeBSD.org .
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.Sh BUGS
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The assignment of Julian\(enGregorian switching dates to country
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codes is historically naive for many countries.
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.Pp
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Not all options are compatible and using them in different orders
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will give varying results.
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.Pp
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It is not possible to display Monday as the first day of the week with
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.Nm cal .
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