CAL(1)

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#操作系统

为什么80%的码农都做不了架构师？>>>

CAL(1)              BSD General Commands Manual           CAL(1)

NAME
     cal - displays a calendar

SYNOPSIS
     cal [-smjy13] [[[day] month] year]

DESCRIPTION
     Cal displays a simple calendar. If arguments are not specified, the cur-
     rent month is displayed. The options are as follows:

     -1         Display single month output. (This is the default.)

     -3         Display prev/current/next month output.

     -s         Display Sunday as the first day of the week.

     -m         Display Monday as the first day of the week.

     -j         Display Julian dates (days one-based, numbered from January 1).

     -y         Display a calendar for the current year.

     -V         Display version information and exit.

     A single parameter specifies the year (1 - 9999) 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 Jan 1. The first day of the week is determined by the
     locale.

     The Gregorian Reformation is assumed to have occurred in 1752 on the 3rd
     of September. By this time, most countries had recognized the reforma-
     tion (although a few did not recognize it until the early 1900’s.)   Ten
     days following that date were eliminated by the reformation, so the cal-
     endar for that month is a bit unusual.

HISTORY
     A cal command appeared in Version 6 AT&T UNIX.

OTHER VERSIONS
     Several much more elaborate versions of this program exist, with support
     for colors, holidays, birthdays, reminders and appointments, etc. For
     example, try the cal from http://home.sprynet.com/~cbagwell/projects.html
     or GNU gcal.

AVAILABILITY
     The cal command is part of the util-linux-ng package and is available
     from ftp://ftp.kernel.org/pub/linux/utils/util-linux-ng/.

BSD               June 6, 1993                   BSD

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