cal: add --color to usage()

[thirdparty/util-linux.git] / misc-utils / cal.1

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.\" Kim Letkeman.
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.\"     @(#)cal.1	8.1 (Berkeley) 6/6/93
.\"
.TH CAL 1 "June 2011" "util-linux" "User Commands"
.SH NAME
cal \- display a calendar
.SH SYNOPSIS
.B cal
[\fIoptions\fR] [[[\fIday\fR] \fImonth\fR] \fIyear\fR]
.SH DESCRIPTION
.B cal
displays a simple calendar.  If no arguments are specified, the current
month is displayed.
.SH OPTIONS
.TP
\fB\-1\fR, \fB\-\-one\fR
Display single month output.
(This is the default.)
.TP
\fB\-3\fR, \fB\-\-three\fR
Display prev/current/next month output.
.TP
\fB\-s\fR, \fB\-\-sunday\fR
Display Sunday as the first day of the week.
.TP
\fB\-m\fR, \fB\-\-monday\fR
Display Monday as the first day of the week.
.TP
\fB\-j\fR, \fB\-\-julian\fR
Display Julian dates (days one-based, numbered from January 1).
.TP
\fB\-y\fR, \fB\-\-year\fR
Display a calendar for the current year.
.TP
\fB\-V\fR, \fB\-\-version\fR
Display version information and exit.
.TP
\fB\-h\fR, \fB\-\-help\fR
Display help screen and exit.
.SH PARAMETERS
A single parameter specifies the year (1 - 9999) to be displayed; note the
year must be fully specified:
.B "cal 89"
will not display a calendar for 1989.
.PP
Two parameters denote the month (1 - 12) and year.
.PP
Three parameters denote the day (1-31), month and year, and the day will be
highlighted if the calendar is displayed on a terminal. If no parameters are
specified, the current month's calendar is displayed.
.PP
A year starts on Jan 1. The first day of the week is determined by the
locale.
.PP
The Gregorian Reformation is assumed to have occurred in 1752 on the 3rd of
September. By this time, most countries had recognized the reformation
(although a few did not recognize it until the early 1900's). Ten days
following that date were eliminated by the reformation, so the calendar for
that month is a bit unusual.
.SH HISTORY
A cal command appeared in Version 6 AT&T UNIX.
.SH AVAILABILITY
The cal command is part of the util-linux package and is available from
ftp://ftp.kernel.org/pub/linux/utils/util-linux/.