2.9BSD - /usr/include/sys/time.h

   1: struct  tm  { /* see ctime(3) */
   2:     short   tm_sec;
   3:     short   tm_min;
   4:     short   tm_hour;
   5:     short   tm_mday;
   6:     short   tm_mon;
   7:     short   tm_year;
   8:     short   tm_wday;
   9:     short   tm_yday;
  10:     short   tm_isdst;
  11: };

Defined struct's

Usage of this include