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

.\" Copyright (c) 1997 Wolfgang Helbig
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.\"	$Id: ncal.1,v 1.5 1998/01/12 05:02:57 obrien Exp $
.\"
.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 cal
.Op Fl jy
.Op Oo Ar month Oc Ar \ year
.Nm ncal
.Op Fl jJpwy
.Op Fl s Ar country_code
.Op Oo Ar month Oc Ar \ year
.Nm ncal
.Op Fl Jeo
.Op Ar year
.Sh DESCRIPTION
.Nm Cal
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 (1 - 12) and year.
.Pp
A year starts on Jan 1.
.Pp
.Sh SEE ALSO
.Xr calendar 3 ,
.Xr strftime 3
.Rs
.Sh HISTORY
A
.Nm cal
command appeared in
.At v6 .
The
.Nm ncal
command appeared after
.Fx 2.2.5 .
.Sh AUTHORS
This
manual page and the command was 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.