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diff --git a/misc-utils/cal.1 b/misc-utils/cal.1 new file mode 100644 index 0000000..5a8095f --- /dev/null +++ b/misc-utils/cal.1 @@ -0,0 +1,231 @@ +.\" Copyright (c) 1989, 1990, 1993 +.\" The Regents of the University of California. All rights reserved. +.\" +.\" This code is derived from software contributed to Berkeley by +.\" Kim Letkeman. +.\" +.\" 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. +.\" 3. All advertising materials mentioning features or use of this software +.\" must display the following acknowledgement: +.\" This product includes software developed by the University of +.\" California, Berkeley and its contributors. +.\" 4. Neither the name of the University nor the names of its contributors +.\" may be used to endorse or promote products derived from this software +.\" without specific prior written permission. +.\" +.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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. +.\" +.\" @(#)cal.1 8.1 (Berkeley) 6/6/93 +.\" +.TH CAL 1 "January 2018" "util-linux" "User Commands" +.SH NAME +cal \- display a calendar +.SH SYNOPSIS +.B cal +[options] +.RI [[[ day ] " month" ] " year" ] +.br +.B cal +[options] +.RI [ "timestamp" | "monthname" ] +.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), as a month name or as an +abbreviated month name according to the current locales. +.sp +Two different calendar systems are used, Gregorian and Julian. These are +nearly identical systems with Gregorian making a small adjustment to the +frequency of leap years; this facilitates improved synchronization with solar +events like the equinoxes. The Gregorian calendar reform was introduced in +1582, but its adoption continued up to 1923. By default +.B cal +uses the adoption date of 3 Sept 1752. From that date forward the Gregorian +calendar is displayed; previous dates use the Julian calendar system. 11 days +were removed at the time of adoption to bring the calendar in sync with solar +events. So Sept 1752 has a mix of Julian and Gregorian dates by which the 2nd +is followed by the 14th (the 3rd through the 13th are absent). +.sp +Optionally, either the proleptic Gregorian calendar or the Julian calendar may +be used exclusively. +.RB See\ \-\-reform\ below. +.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 +.B \-\-iso +Display the proleptic Gregorian calendar exclusively. +.RB See\ \-\-reform\ below. +.TP +\fB\-j\fR, \fB\-\-julian\fR +Use day-of-year numbering for all calendars. These are also called ordinal +days. Ordinal days range from 1 to 366. This option does not switch from the +Gregorian to the Julian calendar system, that is controlled by the +.BR \-\-reform\ option. +.sp +Sometimes Gregorian calendars using ordinal dates are referred to as Julian +calendars. This can be confusing due to the many date related conventions that +use Julian in their name: (ordinal) julian date, julian (calendar) date, +(astronomical) julian date, (modified) julian date, and more. This option is +named julian, because ordinal days are identified as julian by the POSIX +standard. However, be aware that +.B cal +also uses the Julian calendar system. +.RB See\ DESCRIPTION\ above. +.TP +.BI \-\-reform\ val +This option sets the adoption date of the Gregorian calendar reform. Calendar +dates previous to reform use the Julian calendar system. Calendar dates +after reform use the Gregorian calendar system. The argument +.I val +can be: +.RS +.IP \(bu 2 +.I 1752 +- sets 3 September 1752 as the reform date (default). +This is when the Gregorian calendar reform was adopted by the British Empire. +.IP \(bu 2 +.I gregorian +- display Gregorian calendars exclusively. This special placeholder sets the +reform date below the smallest year that +.B cal +can use; meaning all calendar output uses the Gregorian calendar system. This +is called the proleptic Gregorian calendar, because dates prior to the calendar +system's creation use extrapolated values. +.IP \(bu 2 +.I iso +- alias of +.IR gregorian . +The ISO 8601 standard for the representation of dates and times in information +interchange requires using the proleptic Gregorian calendar. +.IP \(bu 2 +.I julian +- display Julian calendars exclusively. This special placeholder sets the reform date above the largest year that +.B cal +can use; meaning all +calendar output uses the Julian calendar system. +.PP +.RB See\ \%DESCRIPTION\ above. +.RE +.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 +.TP +\fBSingle digits-only parameter (e.g. 'cal 2020')\fR +Specifies the \fIyear\fR to be displayed; note the year must be fully specified: +.B "cal 89" +will not display a calendar for 1989. +.TP +\fBSingle string parameter (e.g. 'cal tomorrow' or 'cal August')\fR +Specifies \fItimestamp\fR or a \fImonth name\fR (or abbreviated name) according to the current +locales. +.sp +The special placeholders are accepted when parsing timestamp, "now" may be used +to refer to the current time, "today", "yesterday", "tomorrow" refer to of the +current day, the day before or the next day, respectively. +.sp +The relative date specifications are also accepted, in this case "+" is +evaluated to the current time plus the specified time span. Correspondingly, a +time span that is prefixed with "-" is evaluated to the current time minus the +specified time span, for example '+2days'. Instead of prefixing the time span +with "+" or "-", it may also be suffixed with a space and the word "left" or +"ago" (for example '1 week ago'). +.TP +\fBTwo parameters (e.g. 'cal 11 2020')\fR +Denote the \fImonth\fR (1 - 12) and \fIyear\fR. +.TP +\fBThree parameters (e.g. 'cal 25 11 2020')\fR +Denote the \fIday\fR (1-31), \fImonth and \fIyear\fR, 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. +.SH NOTES +A year starts on January 1. The first day of the week is determined by the +locale or the +.BR \-\-sunday \ and \ \-\-monday \ options. +.PP +The week numbering depends on the choice of the first day of the week. If it +is Sunday then the customary North American numbering is used, where 1 January +is in week number 1. If it is Monday then the ISO 8601 standard week numbering +is used, where the first Thursday is in week number 1. +.SH COLORS +Implicit coloring can be disabled as follows: +.RS + +.br +.B 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 default +.B cal +output uses 3 September 1752 as the Gregorian calendar reform date. The +historical reform dates for the other locales, including its introduction in +October 1582, are not implemented. +.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 +https://www.kernel.org/pub/linux/utils/util-linux/. |