<time.h>

The <time.h> include file declares the time and date functions:

asctime ctime gmtime mktime strptime
clock difftime localtime strftime time

In extended mode, <time.h> also defines the standard extensions _strdate, _strtime, and tzset.

<time.h> also provides:

For more information on NULL and the type size_t, see <stddef.h>.

<time.h> also defines the global variables _daylight, _timezone, and _tzname.



gmtime -- Convert Time
<stddef.h>
#include