cal: allow to specify month by name

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

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.\" This code is derived from software contributed to Berkeley by
.\" Kim Letkeman.
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.\"     @(#)cal.1	8.1 (Berkeley) 6/6/93
.\"
.TH CAL 1 "June 2015" "util-linux" "User Commands"
.SH NAME
cal \- display a calendar
.SH SYNOPSIS
.B cal
[options]
.RI [[[ day ] " month" ] " year" ]
.SH DESCRIPTION
.B cal
displays a simple calendar.  If no arguments are specified, the current
month is displayed.
.sp
The \fImonth\fR may be specified as a number (1-12) or as a month name according
to the current locales.
.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 three months spanning the date.
.TP
\fB\-n , \-\-months\fR \fInumber\fR
Display \fInumber\fR of months, starting from the month containing the date.
.TP
\fB\-S, \fB\-\-span\fR
Display months spanning the date.
.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 whole year.
.TP
\fB\-Y, \fB\-\-twelve\fR
Display a calendar for the next twelve months.
.TP
\fB\-w\fR, \fB\-\-week\fR[=\fInumber\fR]
Display week numbers in the calendar (US or ISO-8601).
.TP
\fB\-\-color\fR[=\fIwhen\fR]
Colorize the output.  The optional argument \fIwhen\fP
can be \fBauto\fR, \fBnever\fR or \fBalways\fR.  If the \fIwhen\fR argument is omitted,
it defaults to \fBauto\fR.  The colors can be disabled; for the current built-in default
see the \fB\-\-help\fR output.  See also the \fBCOLORS\fR section.
.TP
\fB\-V\fR, \fB\-\-version\fR
Display version information and exit.
.TP
\fB\-h\fR, \fB\-\-help\fR
Display help text and exit.
.SH PARAMETERS
A single parameter specifies the year 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 January 1.  The first day of the week is determined by the
locale.
.PP
The week numbering depends on the choice of the first day of the week.  If Sunday
(the default) is used for the first day of the week, then the customary North
American numbering will be used, i.e. the first Sunday of the year starts the
first week.  If Monday is selected, then the ISO-8601 standard week numbering
is used, where the first Thursday of the year is in week number 1.
.SH COLORS
Implicit coloring can be disabled as follows:
.RS

.br
.BI "touch /etc/terminal-colors.d/cal.disable"
.br

.RE
See
.BR terminal-colors.d (5)
for more details about colorization configuration.
.SH BUGS
.PP
The
.B cal
program uses the 3rd of September 1752 as the date of the Gregorian calendar
reformation -- that is when it happened in Great Britain and its colonies
(including what is now the USA).  Starting at that date, eleven days were eliminated
by this reformation, so the calendar for that month is rather unusual.
The actual historical dates at which the calendar reform happened in all the
different countries (locales) are ignored.
.PP
Alternative calendars, such as the Umm al-Qura, the Solar Hijri, the Ge'ez,
or the lunisolar Hindu, are not supported.
.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/.