xref: /freebsd/usr.bin/ncal/ncal.1 (revision 7149aa0155e622c479178cd4e70cc72f15da1b90)

.\" Copyright (c) 1997 Wolfgang Helbig
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.\" $FreeBSD$
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.Dd March 14, 2009
.Dt CAL 1
.Os
.Sh NAME
.Nm cal ,
.Nm ncal
.Nd displays a calendar and the date of Easter
.Sh SYNOPSIS
.Nm
.Op Fl hjy
.Oo
.Op Ar month
.Ar year
.Oc
.Nm
.Op Fl hj
.Fl m Ar month
.Op Ar year
.Nm ncal
.Op Fl hjJpwy
.Op Fl s Ar country_code
.Oo
.Op Ar month
.Ar year
.Oc
.Nm ncal
.Op Fl hJeo
.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 h
Turns off highlighting of today.
.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 m Ar month
Display the specified
.Ar month .
If
.Ar month
is specified as a decimal number, it may be followed by the letter
.Ql f
or
.Ql p
to indicate the following or preceding month of that number,
respectively.
.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 specified year.
.El
.Pp
A single parameter specifies the year (1\(en9999) 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.
Month and year default to those of the current system clock and time zone (so
.Dq Li cal -m 8
will display a calendar for the month of August in the current year).
.Pp
A year starts on January 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\(enGregorian switching dates to
country codes is historically naive for many countries.