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DATE(1)			  BSD General Commands Manual		       DATE(1)

NAME
     date -- display or	set date and time

SYNOPSIS
     date [-ajnu] [-d date] [-r	seconds] [+format]
	  [[[[[[CC]yy]mm]dd]HH]MM[.SS]]

DESCRIPTION
     date displays the current date and	time when invoked without arguments.
     Providing arguments will format the date and time in a user-defined way
     or	set the	date.  Only the	superuser may set the date.

     The options are as	follows:

     -a	     Use adjtime(2) to change the local	system time slowly, maintain-
	     ing it as a monotonically increasing function.  -a	implies	-n.

     -d	date
	     Parse the provided	human-described	date and time and display the
	     result without actually changing the system clock.	 (See
	     parsedate(3) for examples.)

     -j	     Parse the provided	canonical representation of date and time (de-
	     scribed below) and	display	the result without actually changing
	     the system	clock.

     -n	     The utility timed(8) is used to synchronize the clocks on groups
	     of	machines.  By default, if timed	is running, date will set the
	     time on all of the	machines in the	local group.  The -n option
	     stops date	from setting the time for other	than the current ma-
	     chine.

     -r	seconds
	     Print out the date	and time that is seconds from the Epoch.

     -u	     Display or	set the	date in	UTC (universal)	time.

     An	operand	with a leading plus (+)	sign signals a user-defined format
     string which specifies the	format in which	to display the date and	time.
     The format	string may contain any of the conversion specifications	de-
     scribed in	the strftime(3)	manual page, as	well as	any arbitrary text.  A
     <newline> character is always output after	the characters specified by
     the format	string.	 The format string for the default display is:

	   %a %b %e %H:%M:%S %Z	%Y

     If	an operand does	not have a leading plus	sign, it is interpreted	as a
     value for setting the system's notion of the current date and time.  The
     canonical representation for setting the date and time is:

	   CC	   The first two digits	of the year (the century).
	   yy	   The second two digits of the	year.  If yy is	specified, but
		   CC is not, a	value for yy between 69	and 99 results in a CC
		   value of 19.	 Otherwise, a CC value of 20 is	used.
	   mm	   The month of	the year, from 01 to 12.
	   dd	   The day of the month, from 01 to 31.
	   HH	   The hour of the day,	from 00	to 23.
	   MM	   The minute of the hour, from	00 to 59.
	   SS	   The second of the minute, from 00 to	61.

     Everything	but the	minutes	is optional.

     Time changes for Daylight Saving and Standard time	and leap seconds and
     years are handled automatically.

ENVIRONMENT
     The following environment variables affect	the execution of date:

     TZ	  The timezone to use when displaying dates.  See environ(7) for more
	  information.

FILES
     /etc/localtime	Symlink	pointing to system's default timezone informa-
			tion file in /usr/share/zoneinfo directory.
     /var/log/wtmp	A record of date resets	and time changes.
     /var/log/messages	A record of the	user setting the time.

EXAMPLES
     The command:

	   date	'+DATE:	%m/%d/%y%nTIME:	%H:%M:%S'

     will display:

	   DATE: 11/21/87
	   TIME: 13:36:16

     The command:

	   date	8506131627

     sets the date to "June 13,	1985, 4:27 PM".

     The command:

	   date	1432

     sets the time to 2:32 PM, without modifying the date.

DIAGNOSTICS
     Exit status is 0 on success, 1 if unable to set the date, and 2 if	able
     to	set the	local date, but	unable to set it globally.

     Occasionally, when	timed(8) synchronizes the time on many hosts, the set-
     ting of a new time	value may require more than a few seconds.  On these
     occasions,	date prints: `Network time being set'.	The message
     `Communication error with timed' occurs when the communication between
     date and timed fails.

SEE ALSO
     adjtime(2), gettimeofday(2), settimeofday(2), parsedate(3), strftime(3),
     utmp(5), timed(8)

     R.	Gusella	and S. Zatti, TSP: The Time Synchronization Protocol for UNIX
     4.3BSD.

STANDARDS
     The date utility is expected to be	compatible with	IEEE Std 1003.2
     ("POSIX.2").

BSD			       November	15, 2006			   BSD

NAME | SYNOPSIS | DESCRIPTION | ENVIRONMENT | FILES | EXAMPLES | DIAGNOSTICS | SEE ALSO | STANDARDS

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