freebsd-dev/usr.bin/ncal/ncal.1

.\" Copyright (c) 1997 Wolfgang Helbig
.\" All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\"    notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\"    notice, this list of conditions and the following disclaimer in the
.\"    documentation and/or other materials provided with the distribution.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
.\" $FreeBSD$
.\"
.Dd December 16, 1997
.Dt CAL 1
.Os
.Sh NAME
.Nm cal ,
.Nm ncal
.Nd displays a calendar and the date of easter
.Sh SYNOPSIS
.Nm
.Op Fl jy
.Oo
.Op Ar month
.Ar year
.Oc
.Nm ncal
.Op Fl jJpwy
.Op Fl s Ar country_code
.Oo
.Op Ar month
.Ar year
.Oc
.Nm ncal
.Op Fl Jeo
.Op Ar year
.Sh DESCRIPTION
The
.Nm
utility displays a simple calendar in traditional format and
.Nm ncal
offers an alternative layout, more options and the date of easter.
The new format is a little cramped but it makes a year fit
on a 25x80 terminal.
If arguments are not specified,
the current month is displayed.
.Pp
The options are as follows:
.Bl -tag -width indent
.It Fl J
Display Julian Calendar, if combined with the
.Fl e
option, display date of easter according to the Julian Calendar.
.It Fl e
Display date of easter (for western churches).
.It Fl j
Display Julian days (days one-based, numbered from January 1).
.It Fl o
Display date of orthodox easter (Greek and Russian
Orthodox Churches).
.It Fl p
Print the country codes and switching days from Julian to Gregorian
Calendar as they are assumed by
.Nm ncal .
The country code as determined from the local environment is marked
with an asterisk.
.It Fl s Ar country_code
Assume the switch from Julian to Gregorian Calendar at the date
associated with the
.Ar country_code .
If not specified,
.Nm ncal
tries to guess the switch date from the local environment or
falls back to September 2, 1752. This was when Great
Britain and her colonies switched to the Gregorian Calendar.
.It Fl w
Print the number of the week below each week column.
.It Fl y
Display a calendar for the current year.
.El
.Pp
A single parameter specifies the year (1 - 9999) to be displayed;
note the year must be fully specified:
.Dq Li cal 89
will
.Em not
display a calendar for 1989.
Two parameters denote the month and year; the month is either a number between
1 and 12, or a full or abbreviated name as specified by the current locale.
.Pp
A year starts on Jan 1.
.Sh SEE ALSO
.Xr calendar 3 ,
.Xr strftime 3
.Sh HISTORY
A
.Nm
command appeared in
.At v5 .
The
.Nm ncal
command appeared in
.Fx 2.2.6 .
.Sh AUTHORS
The
.Nm ncal
command and manual were written by
.An Wolfgang Helbig Aq helbig@FreeBSD.org .
.Sh BUGS
The assignment of Julian - Gregorian switching dates to
country codes is historically naive for many countries.