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1 .\" $NetBSD: cal.1,v 1.19 2007/12/21 14:21:42 joerg Exp $
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6 .\" This code is derived from software contributed to Berkeley by
7 .\" Kim Letkeman.
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33 .\" @(#)cal.1 8.2 (Berkeley) 4/28/95
34 .\"
35 .Dd December 21, 2007
36 .Dt CAL 1
37 .Os
38 .Sh NAME
39 .Nm cal
40 .Nd displays a calendar
41 .Sh SYNOPSIS
42 .Nm
43 .Op Fl 3hjry
44 .Op Fl A Ar after
45 .Op Fl B Ar before
46 .Op Fl d Ar day-of-week
47 .Op Fl R Ar reform-spec
48 .Op Oo Ar month Oc Ar year
49 .Sh DESCRIPTION
50 .Nm
51 displays a simple calendar.
52 If arguments are not specified,
53 the current month is displayed.
54 The options are as follows:
55 .Bl -tag -width Ds
56 .It Fl 3
57 Same as
58 .Dq Fl A Ar 1 Fl B Ar 1 .
59 .It Fl A Ar after
60 Display
61 .Ar after
62 months after the specified month.
63 .It Fl B Ar before
64 Display
65 .Ar before
66 months before the specified month.
67 .It Fl d Ar day-of-week
68 Specifies the day of the week on which the calendar should start.
69 Valid values are 0 through 6, presenting Sunday through Saturday,
70 inclusively.
71 The default output starts on Sundays.
72 .It Fl h
73 Highlight the current day, if present in the displayed calendar.
74 If output is to a terminal, then the appropriate terminal sequences
75 are used, otherwise overstriking is used.
76 If more than one
77 .Fl h
78 is used and output is to a terminal, the current date will be
79 highlighted in inverse video instead of bold.
80 .It Fl j
81 Display Julian dates (days one-based, numbered from January 1).
82 .It Fl R Ar reform-spec
83 Selects an alternate Gregorian reform point from the default of
84 September 3rd, 1752.
85 The
86 .Ar reform-spec
87 can be selected by one of the built-in names (see
88 .Sx NOTES
89 for a list) or by a date of the form YYYY/MM/DD.
90 The date and month may be omitted, provided that what is specified
91 uniquely selects a given built-in reform point.
92 If an exact date is specified, then that date is taken to be the first
93 missing date of the Gregorian Reform to be applied.
94 .It Fl r
95 Display the month in which the Gregorian Reform adjustment was
96 applied, if no other
97 .Ar month
98 or
99 .Ar year
100 information is given.
101 If used in conjunction with
102 .Fl y ,
103 then the entire year is displayed.
104 .It Fl y
105 Display a calendar for the current year.
106 .El
107 .Pp
108 If no parameters are specified, the current month's calendar is
109 displayed.
110 A single parameter specifies the year and optionally the month
111 in ISO format:
112 .Dq Li cal 2007-12
113 Two parameters denote the month (1 - 12) and year.
114 Note that the century must be included in the year.
115 .Pp
116 A year starts on Jan 1.
117 .Sh NOTES
118 In the USA and Great Britain the Gregorian Reformation occurred in 1752.
119 By this time, most countries had recognized the reformation (although a
120 few did not recognize it until the 1900's.)
121 Eleven days following September 2, 1752 were eliminated by the reformation,
122 so the calendar for that month is a bit unusual.
123 .Pp
124 In view of the chaotic way the Gregorian calendar was adopted throughout
125 the world in the years between 1582 and 1928 make sure to take into account
126 the date of the Gregorian Reformation in your region if you are checking a
127 calendar for a very old date.
128 .Pp
129 .Nm
130 has a decent built-in list of Gregorian Reform dates and the names of
131 the countries where the reform was adopted:
132 .Pp
133 .Bd -literal
134 Italy Oct. 5, 1582 Denmark Feb. 19, 1700
135 Spain Oct. 5, 1582 Great Britain Sep. 3, 1752
136 Portugal Oct. 5, 1582 Sweden Feb. 18, 1753
137 Poland Oct. 5, 1582 Finland Feb. 18, 1753
138 France Dec. 12, 1582 Japan Dec. 20, 1872
139 Luxembourg Dec. 22, 1582 China Nov. 7, 1911
140 Netherlands Dec. 22, 1582 Bulgaria Apr. 1, 1916
141 Bavaria Oct. 6, 1583 U.S.S.R. Feb. 1, 1918
142 Austria Jan. 7, 1584 Serbia Jan. 19, 1919
143 Switzerland Jan. 12, 1584 Romania Jan. 19, 1919
144 Hungary Oct. 22, 1587 Greece Mar. 10, 1924
145 Germany Feb. 19, 1700 Turkey Dec. 19, 1925
146 Norway Feb. 19, 1700 Egypt Sep. 18, 1928
147 .Ed
148 .Pp
149 The country known as
150 .Em Great Britain
151 can also be referred to as
152 .Em England
153 since that has less letters and no spaces in it.
154 This is meant only as a measure of expediency, not as a possible
155 slight to anyone involved.
156 .Sh HISTORY
157 A
158 .Nm
159 command appeared in
160 .At v6 .