Need help in finding in date difference

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convdate

CONVDATE(1)						      General Commands Manual						       CONVDATE(1)

NAME

       convdate - convert time/date strings and numbers

SYNOPSIS

       convdate [ -c ] [ -n ] [ -s ] arg...

DESCRIPTION

       Convdate translate the date/time strings specified as arguments on its command line, outputing the results one to a line.

OPTIONS

       -c     If the ``-c'' flag is used, then each argument is taken to be a time_t and is output in ctime format.

       -n     If the ``-n'' flag is used, then each argument is taken as a date string to be parsed by parsedate(3) and is output as a time_t; see
	      time(2).

       -s     If the ``-s'' flag is used, then each argument is taken as a date string to be parsed by parsedate(3) and is output as a string for-
	      matted by ctime(3).  This is the default.

EXAMPLES

	      % convdate 'feb 10 10am'
	      Sun Feb 10 10:00:00 1991

	      % convdate 12pm 5/4/90
	      Fri Dec 13 00:00:00 1991
	      Fri May  4 00:00:00 1990

	      % convdate -n 'feb 10 10am' '12pm 5/4/90'
	      666198000
	      641880000

	      % convdate -c 666198000
	      Sun Feb 10 10:00:00 1991

HISTORY

       Written by Rich $alz <rsalz@uunet.uu.net>.  This is revision 1.5, dated 1996/10/29.

SEE ALSO

       parsedate(3).

																       CONVDATE(1)

Shell Programming and Scripting