misc_cmds/ncal/ncal.1

   1 .\" Copyright (c) 1997 Wolfgang Helbig
   2 .\" All rights reserved.
   3 .\"
   4 .\" Redistribution and use in source and binary forms, with or without
   5 .\" modification, are permitted provided that the following conditions
   6 .\" are met:
   7 .\" 1. Redistributions of source code must retain the above copyright
   8 .\"    notice, this list of conditions and the following disclaimer.
   9 .\" 2. Redistributions in binary form must reproduce the above copyright
  10 .\"    notice, this list of conditions and the following disclaimer in the
  11 .\"    documentation and/or other materials provided with the distribution.
  12 .\"
  13 .\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  14 .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  15 .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  16 .\" ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  17 .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  18 .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  19 .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  20 .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  21 .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  22 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  23 .\" SUCH DAMAGE.
  24 .\"
  25 .\" $FreeBSD$
  26 .\"
  27 .Dd March 14, 2009
  28 .Dt CAL 1
  29 .Os
  30 .Sh NAME
  31 .Nm cal ,
  32 .Nm ncal
  33 .Nd displays a calendar and the date of Easter
  34 .Sh SYNOPSIS
  35 .Nm
  36 .Op Fl 3hjy
  37 .Op Fl A Ar number
  38 .Op Fl B Ar number
  39 .Oo
  40 .Op Ar month
  41 .Ar year
  42 .Oc
  43 .Nm
  44 .Op Fl 3hj
  45 .Op Fl A Ar number
  46 .Op Fl B Ar number
  47 .Fl m Ar month
  48 .Op Ar year
  49 .Nm ncal
  50 .Op Fl 3hjJpwy
  51 .Op Fl A Ar number
  52 .Op Fl B Ar number
  53 .Op Fl s Ar country_code
  54 .Oo
  55 .Op Ar month
  56 .Ar year
  57 .Oc
  58 .Nm ncal
  59 .Op Fl 3hJeo
  60 .Op Fl A Ar number
  61 .Op Fl B Ar number
  62 .Op Ar year
  63 .Nm ncal
  64 .Op Fl CN
  65 .Op Fl H Ar yyyy-mm-dd
  66 .Op Fl d Ar yyyy-mm
  67 .Sh DESCRIPTION
  68 The
  69 .Nm
  70 utility displays a simple calendar in traditional format and
  71 .Nm ncal
  72 offers an alternative layout, more options and the date of Easter.
  73 The new format is a little cramped but it makes a year fit
  74 on a 25x80 terminal.
  75 If arguments are not specified,
  76 the current month is displayed.
  77 .Pp
  78 The options are as follows:
  79 .Bl -tag -width indent
  80 .It Fl h
  81 Turns off highlighting of today.
  82 .It Fl J
  83 Display Julian Calendar, if combined with the
  84 .Fl e
  85 option, display date of Easter according to the Julian Calendar.
  86 .It Fl e
  87 Display date of Easter (for western churches).
  88 .It Fl j
  89 Display Julian days (days one-based, numbered from January 1).
  90 .It Fl m Ar month
  91 Display the specified
  92 .Ar month .
  93 If
  94 .Ar month
  95 is specified as a decimal number, it may be followed by the letter
  96 .Ql f
  97 or
  98 .Ql p
  99 to indicate the following or preceding month of that number,
 100 respectively.
 101 .It Fl o
 102 Display date of Orthodox Easter (Greek and Russian
 103 Orthodox Churches).
 104 .It Fl p
 105 Print the country codes and switching days from Julian to Gregorian
 106 Calendar as they are assumed by
 107 .Nm ncal .
 108 The country code as determined from the local environment is marked
 109 with an asterisk.
 110 .It Fl s Ar country_code
 111 Assume the switch from Julian to Gregorian Calendar at the date
 112 associated with the
 113 .Ar country_code .
 114 If not specified,
 115 .Nm ncal
 116 tries to guess the switch date from the local environment or
 117 falls back to September 2, 1752.
 118 This was when Great
 119 Britain and her colonies switched to the Gregorian Calendar.
 120 .It Fl w
 121 Print the number of the week below each week column.
 122 .It Fl y
 123 Display a calendar for the specified year.
 124 .It Fl 3
 125 Display the previous, current and next month surrounding today.
 126 .It Fl A Ar number
 127 Display the
 128 .Ar number
 129 of months after the current month.
 130 .It Fl B Ar number
 131 Display the
 132 .Ar number
 133 of months before the current month.
 134 .It Fl C
 135 Switch to
 136 .Nm cal
 137 mode.
 138 .It Fl N
 139 Switch to
 140 .Nm ncal
 141 mode.
 142 .It Fl d Ar yyyy-mm
 143 Use
 144 .Ar yyyy-mm
 145 as the current date (for debugging of date selection).
 146 .It Fl H Ar yyyy-mm-dd
 147 Use
 148 .Ar yyyy-mm-dd
 149 as the current date (for debugging of highlighting).
 150 .El
 151 .Pp
 152 A single parameter specifies the year (1\(en9999) to be displayed;
 153 note the year must be fully specified:
 154 .Dq Li cal 89
 155 will
 156 .Em not
 157 display a calendar for 1989.  Two parameters denote the month and
 158 year; the month is either a number between 1 and 12, or a full or
 159 abbreviated name as specified by the current locale.  Month and
 160 year default to those of the current system clock and time zone (so
 161 .Dq Li cal -m 8
 162 will display a calendar for the month of August in the current
 163 year).
 164 .Pp
 165 Not all options can be used together. For example
 166 .Dq Li -3 -A 2 -B 3 -y -m 7
 167 would mean:
 168 show me the three months around the seventh month, three before
 169 that, two after that and the whole year.
 170 .Nm ncal
 171 will warn about these combinations.
 172 .Pp
 173 A year starts on January 1.
 174 .Pp
 175 Highlighting of dates is disabled if stdout is not a tty.
 176 .Sh SEE ALSO
 177 .Xr calendar 3 ,
 178 .Xr strftime 3
 179 .Sh HISTORY
 180 A
 181 .Nm
 182 command appeared in
 183 .At v5 .
 184 The
 185 .Nm ncal
 186 command appeared in
 187 .Fx 2.2.6 .
 188 .Sh AUTHORS
 189 The
 190 .Nm ncal
 191 command and manual were written by
 192 .An Wolfgang Helbig Aq Mt helbig@FreeBSD.org .
 193 .Sh BUGS
 194 The assignment of Julian\(enGregorian switching dates to country
 195 codes is historically naive for many countries.
 196 .Pp
 197 Not all options are compatible and using them in different orders
 198 will give varying results.