1 .\" $NetBSD: cal.1,v 1.21 2015/01/08 03:56:33 christos Exp $
3 .\" Copyright (c) 1989, 1990, 1993
4 .\" The Regents of the University of California. All rights reserved.
6 .\" This code is derived from software contributed to Berkeley by
9 .\" Redistribution and use in source and binary forms, with or without
10 .\" modification, are permitted provided that the following conditions
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. Neither the name of the University nor the names of its contributors
18 .\" may be used to endorse or promote products derived from this software
19 .\" without specific prior written permission.
21 .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 .\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 .\" @(#)cal.1 8.2 (Berkeley) 4/28/95
40 .Nd displays a calendar
47 .Op Fl d Ar day-of-week
48 .Op Fl R Ar reform-spec
49 .Op Oo Ar month Oc Ar year
52 displays a simple calendar.
53 If arguments are not specified,
54 the current month is displayed.
55 The options are as follows:
59 .Dq Fl A Ar 1 Fl B Ar 1 .
63 months after the specified month.
67 months before the specified month.
71 months before and after the specified month.
72 .It Fl d Ar day-of-week
73 Specifies the day of the week on which the calendar should start.
74 Valid values are 0 through 6, presenting Sunday through Saturday,
76 The default output starts on Sundays.
78 Highlight the current day, if present in the displayed calendar.
79 If output is to a terminal, then the appropriate terminal sequences
80 are used, otherwise overstriking is used.
83 is used and output is to a terminal, the current date will be
84 highlighted in inverse video instead of bold.
86 Display Julian dates (days one-based, numbered from January 1).
87 .It Fl R Ar reform-spec
88 Selects an alternate Gregorian reform point from the default of
92 can be selected by one of the built-in names (see
94 for a list) or by a date of the form YYYY/MM/DD.
95 The date and month may be omitted, provided that what is specified
96 uniquely selects a given built-in reform point.
97 If an exact date is specified, then that date is taken to be the first
98 missing date of the Gregorian Reform to be applied.
100 Display the month in which the Gregorian Reform adjustment was
105 information is given.
106 If used in conjunction with
108 then the entire year is displayed.
110 Display a calendar for the current year.
113 If no parameters are specified, the current month's calendar is
115 A single parameter specifies the year and optionally the month
118 Two parameters denote the month (1 - 12) and year.
119 Note that the century must be included in the year.
121 A year starts on Jan 1.
123 In the USA and Great Britain the Gregorian Reformation occurred in 1752.
124 By this time, most countries had recognized the reformation (although a
125 few did not recognize it until the 1900's.)
126 Eleven days following September 2, 1752 were eliminated by the reformation,
127 so the calendar for that month is a bit unusual.
129 In view of the chaotic way the Gregorian calendar was adopted throughout
130 the world in the years between 1582 and 1928 make sure to take into account
131 the date of the Gregorian Reformation in your region if you are checking a
132 calendar for a very old date.
135 has a decent built-in list of Gregorian Reform dates and the names of
136 the countries where the reform was adopted:
139 Italy Oct. 5, 1582 Denmark Feb. 19, 1700
140 Spain Oct. 5, 1582 Great Britain Sep. 3, 1752
141 Portugal Oct. 5, 1582 Sweden Feb. 18, 1753
142 Poland Oct. 5, 1582 Finland Feb. 18, 1753
143 France Dec. 12, 1582 Japan Dec. 20, 1872
144 Luxembourg Dec. 22, 1582 China Nov. 7, 1911
145 Netherlands Dec. 22, 1582 Bulgaria Apr. 1, 1916
146 Bavaria Oct. 6, 1583 U.S.S.R. Feb. 1, 1918
147 Austria Jan. 7, 1584 Serbia Jan. 19, 1919
148 Switzerland Jan. 12, 1584 Romania Jan. 19, 1919
149 Hungary Oct. 22, 1587 Greece Mar. 10, 1924
150 Germany Feb. 19, 1700 Turkey Dec. 19, 1925
151 Norway Feb. 19, 1700 Egypt Sep. 18, 1928
156 can also be referred to as
158 since that has less letters and no spaces in it.
159 This is meant only as a measure of expediency, not as a possible
160 slight to anyone involved.