107 lines
5.6 KiB
Plaintext
107 lines
5.6 KiB
Plaintext
DATE(1) General Commands Manual DATE(1)
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NAME
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date - show and set date and time
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SYNOPSIS
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date [ -u ] [ -c ] [ -r seconds ] [ +format ] [ [yyyy]mmddhhmm[yy][.ss]
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]
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DESCRIPTION
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Date without arguments writes the date and time to the standard output
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in the form
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Wed Mar 8 14:54:40 EST 1989
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with EST replaced by the local time zone's abbreviation (or by the
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abbreviation for the time zone specified in the TZ environment variable
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if set). The exact output format depends on the locale.
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If a command-line argument starts with a plus sign ("+"), the rest of
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the argument is used as a format that controls what appears in the
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output. In the format, when a percent sign ("%" appears, it and the
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character after it are not output, but rather identify part of the date
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or time to be output in a particular way (or identify a special
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character to output):
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Sample output Explanation
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%a Wed Abbreviated weekday name*
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%A Wednesday Full weekday name*
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%b Mar Abbreviated month name*
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%B March Full month name*
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%c Wed Mar 08 14:54:40 1989 Date and time*
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%C 19 Century
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%d 08 Day of month (always two digits)
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%D 03/08/89 Month/day/year (eight characters)
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%e 8 Day of month (leading zero blanked)
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%h Mar Abbreviated month name*
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%H 14 24-hour-clock hour (two digits)
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%I 02 12-hour-clock hour (two digits)
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%j 067 Julian day number (three digits)
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%k 2 12-hour-clock hour (leading zero blanked)
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%l 14 24-hour-clock hour (leading zero blanked)
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%m 03 Month number (two digits)
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%M 54 Minute (two digits)
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%n \n newline character
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%p PM AM/PM designation
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%r 02:54:40 PM Hour:minute:second AM/PM designation
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%R 14:54 Hour:minute
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%S 40 Second (two digits)
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%t \t tab character
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%T 14:54:40 Hour:minute:second
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%U 10 Sunday-based week number (two digits)
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%w 3 Day number (one digit, Sunday is 0)
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%W 10 Monday-based week number (two digits)
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%x 03/08/89 Date*
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%X 14:54:40 Time*
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%y 89 Last two digits of year
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%Y 1989 Year in full
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%Z EST Time zone abbreviation
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%+ Wed Mar 8 14:54:40 EST 1989 Default output format*
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* The exact output depends on the locale.
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If a character other than one of those shown above appears after a
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percent sign in the format, that following character is output. All
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other characters in the format are copied unchanged to the output; a
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newline character is always added at the end of the output.
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In Sunday-based week numbering, the first Sunday of the year begins
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week 1; days preceding it are part of "week 0". In Monday-based week
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numbering, the first Monday of the year begins week 1.
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To set the date, use a command line argument with one of the following
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forms:
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1454 24-hour-clock hours (first two digits) and minutes
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081454 Month day (first two digits), hours, and minutes
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03081454 Month (two digits, January is 01), month day, hours, minutes
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8903081454 Year, month, month day, hours, minutes
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0308145489 Month, month day, hours, minutes, year
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(on System V-compatible systems)
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030814541989 Month, month day, hours, minutes, four-digit year
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198903081454 Four-digit year, month, month day, hours, minutes
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If the century, year, month, or month day is not given, the current
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value is used. Any of the above forms may be followed by a period and
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two digits that give the seconds part of the new time; if no seconds
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are given, zero is assumed.
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These options are available:
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-u or -c
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Use Universal Time when setting and showing the date and time.
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-r seconds
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Output the date that corresponds to seconds past the epoch of
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1970-01-01 00:00:00 UTC, where seconds should be an integer,
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either decimal, octal (leading 0), or hexadecimal (leading 0x),
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preceded by an optional sign.
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FILES
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/usr/lib/locale/L/LC_TIME description of time locale L
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/usr/local/etc/zoneinfo time zone information directory
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/usr/local/etc/zoneinfo/localtime local time zone file
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/usr/local/etc/zoneinfo/posixrules used with POSIX-style TZ's
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/usr/local/etc/zoneinfo/GMT for UTC leap seconds
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If /usr/local/etc/zoneinfo/GMT is absent, UTC leap seconds are loaded
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from /usr/local/etc/zoneinfo/posixrules.
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DATE(1)
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