cal — display a calendar
cal [options] [ [ [day]
month ] year ]
cal displays a simple calendar. If no arguments are specified, the current month is displayed.
Display single month output. (This is the default.)
Display three months spanning the date.
−n , −−monthsnumber
Display number of months, starting from the month containing the date.
Display months spanning the date.
Display Sunday as the first day of the week.
Display Monday as the first day of the week.
Display Julian dates (days one-based, numbered from January 1).
Display a calendar for the whole year.
Display a calendar for the next twelve months.
Display week numbers in the calendar (US or ISO-8601).
Colorize the output. The optional argument
If the when argument is
omitted, it defaults to auto. The colors can
be disabled; for the current built-in default see the
See also the
Display version information and exit.
Display help text and exit.
A single parameter specifies the year to be displayed; note the year must be fully specified: cal 89 will not display a calendar for 1989.
Two parameters denote the month (1 - 12) and year.
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.
A year starts on January 1. The first day of the week is determined by the locale.
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.
Implicit coloring can be disabled as follows:
See terminal-colors.d(5) for more details about colorization configuration.
The 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.
Alternative calendars, such as the Umm al-Qura, the Solar Hijri, the Ge'ez, or the lunisolar Hindu, are not supported.
The cal command is part of the util-linux package and is available from ftp://ftp.kernel.org/pub/linux/utils/util-linux/.
Copyright (c) 1989, 1990, 1993
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This code is derived from software contributed to Berkeley by
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(#)cal.1 8.1 (Berkeley) 6/6/93