NAME
	  ctime, localtime, gmtime, asctime - convert date and
	  time to string
SYNTAX
	  #include <time.h>
	  char *ctime (clock)
	  long *clock;
	  struct tm *gmtime (clock)
	  long *clock;
	  char *asctime	(tm)
	  struct tm *tm;
DESCRIPTION
	  Ctime	converts a long	integer, pointed to by clock,
	  representing the time	in seconds since 00:00:00 GMT, January
	  1, 1970, and returns a pointer to a 26-character string in
	  the following	form.  All the fields have constant width.
	       Sun Sep 16 01:03:52 1973\n\0
	  Gmtime returns a pointer to a ``tm'' structure,
	  described below. Gmtime converts directly to Greenwich
	  Mean Time (GMT), which is the time the UNIX system uses.
	  Asctime converts a ``tm'' structure to a 26-character
	  string, as shown in the above	example, and returns a pointer
	  to the string.
	  Declarations of all the functions and	externals, and the
	  ``tm'' structure, are	in the <time.h>	header file.  The
	  structure declaration	is:
	       struct tm {
		       int tm_sec; /* seconds (0 - 59) */
		       int tm_min; /* minutes (0 - 59) */
				  
		       int tm_hour;	/* hours (0 - 23) */
		       int tm_mday;	/* day of month	(1 - 31) */
		       int tm_mon;	/* month of year (0 - 11) */
		       int tm_year;	/* year	- 1900 */
		       int tm_wday;	/* day of week (Sunday = 0) */
		       int tm_yday;	/* day of year (0 - 365) */
	       };
SEE ALSO
	  time(2).
BUGS
	  The return values point to static data whose content is
	  overwritten by each call.