date - print or set the date and time

     date [-qsuS] [-r seconds] [[MMDDYY]hhmm[ss]] [+format]


     -q   Read the date from stdin

     -s   Set the time (implicit for -q or a date string)

     -u   Print the date as GMT

     -S   Date within Eternal September

     -r   Use this number of seconds instead of current time


     date                # Print the date and time

     date 0221921610     # Set date to Feb 21, 1992 at 4:10 p.m.


     With the -q flag or a numeric argument, date sets the GMT time and  date.
     MMDDYY  refers  to  the  month, day, and year; hhmmss refers to the hour,
     minute and second.  Each of the six fields must be exactly two digits, no
     more  and  no  less.   date  always  display  the date and time, with the
     default format for the system.  The -u flag request GMT time  instead  of
     local time.  A format may be specified with a + followed by a printf-like
     string with the following options:

        %%  % character
        %A  Name of the day
        %B  Name of the month
        %D  mm/dd/yy
        %H  Decimal hour on 2 digits
        %I  Decimal hour modulo 12 on 2 digits
        %M  Decimal minute on 2 digits
        %S  Decimal seconds on 2 digits
        %T  HH:MM:SS
        %U  Decimal week number, Sunday being first day of week
        %W  Decimal week number, Monday being first day of week
        %X  Same as %T
        %Y  Decimal year on 4 digits
        %Z  Time Zone (if any)
        %a  Abbreviated name of the day
        %b  Abbreviated name of the month
        %c  Appropriate date & time (default format)
        %d  Decimal day of the month on 2 digits
        %e  Same as %d, but a space replaces leading 0
        %h  Same as %b
        %j  Decimal dey of the year on 3 digits
        %m  Decimal month on 2 digits
        %n  Newline character
        %p  AM or PM
        %r  12-hour clock time with AM/PM
        %s  Number of seconds since the epoch
        %t  Tab character
        %w  Decimal day of the week (0=Sunday)
        %x  Same as %D
        %y  Decimal year on 2 digits

     time(2), ctime(3), readclock(8).