Some of the other codes that can be used are :

 %a     The abbreviated weekday name according to the  cur
        rent locale.

 %A     The  full  weekday  name  according  to the current
        locale.

 %b     The abbreviated month name according to the current
        locale.

 %B     The  full  month  name  according  to  the  current
        locale.

 %c     The preferred date and time representation for  the
        current locale.

 %C     The century number (year/100) as a 2-digit integer.

 %d     The day of the month as a decimal number (range  01
        to 31).

 %e     Like  %d, the day of the month as a decimal number,
        but a leading zero is replaced by a space.

 %E     Modifier: use alternative format, see below.

 %G     The ISO 8601 year with century as a decimal number.
        The 4-digit year corresponding to the ISO week num
        ber (see %V).  This has the same format  and  value
        as  %y,  except that if the ISO week number belongs
        to the previous or next year,  that  year  is  used
        instead.

 %g     Like  %G, but without century, i.e., with a 2-digit
        year (00-99).

 %h     Equivalent to %b.

 %H     The hour as a decimal number using a 24-hour  clock
        (range 00 to 23).

 %I     The  hour as a decimal number using a 12-hour clock
        (range 01 to 12).

 %j     The day of the year as a decimal number (range  001
        to 366).

 %k     The hour (24-hour clock) as a decimal number (range
        0 to 23); single digits are preceded  by  a  blank.
        (See also %H.)

 %l     The hour (12-hour clock) as a decimal number (range
        1 to 12); single digits are preceded  by  a  blank.
        (See also %I.)

 %m     The month as a decimal number (range 01 to 12).

 %M     The minute as a decimal number (range 00 to 59).

 %n     A newline character.

 %O     Modifier: use alternative format, see below.

 %p     Either  `AM'  or  `PM'  according to the given time
        value, or the corresponding strings for the current
        locale.   Noon  is  treated as `pm' and midnight as
        `am'.

 %P     Like %p but in lowercase: `am' or `pm' or a  corre
        sponding string for the current locale.

 %r     The  time  in  a.m. or p.m. notation.  In the POSIX
        locale this is equivalent to `%I:%M:%S %p'.

 %R     The time in 24-hour notation (%H:%M). For  a
        version including the seconds, see %T below.

 %s     The  number of seconds since the Epoch, i.e., since
        1970-01-01 00:00:00 UTC.

 %S     The second as a decimal number (range 00 to 61).

 %t     A tab character.

 %T     The time in 24-hour notation (%H:%M:%S).

 %u     The day of the week as a decimal,  range  1  to  7,
        Monday being 1.  See also %w.

 %U     The  week  number  of the current year as a decimal
        number, range 00 to 53,  starting  with  the  first
        Sunday as the first day of week 01. See also %V and
        %W.

 %V     The ISO 8601:1988 week number of the  current  year
        as  a  decimal number, range 01 to 53, where week 1
        is the first week that has at least 4 days  in  the
        current  year,  and with Monday as the first day of
        the week. See also %U and %W.

 %w     The day of the week as a decimal,  range  0  to  6,
        Sunday being 0.  See also %u.

 %W     The  week  number  of the current year as a decimal
        number, range 00 to 53,  starting  with  the  first
        Monday as the first day of week 01.

 %x     The  preferred  date representation for the current
        locale without the time.

 %X     The preferred time representation for  the  current
        locale without the date.

 %y     The  year  as  a  decimal  number without a century
        (range 00 to 99).

 %Y     The year as a decimal number including the century.

 %z     The time-zone as hour offset from GMT.  Required to
        emit RFC822-conformant dates (using "%a, %d  %b  %Y
        %H:%M:%S %z").

 %Z     The time zone or name or abbreviation.

 %%     A literal `%' character.