C Tutorial/time.h/gmtime
gmtime
Item Value Header file time.h Declaration struct tm *gmtime(const time_t *time); Return returns time in Coordinated Universal Time (UTC)(essentially Greenwich mean time).
#include <time.h>
#include <stdio.h>
/* Print local and UTC time. */
int main(void)
{
struct tm *local, *gm;
time_t t;
t = time(NULL);
local = localtime(&t);
printf("Local time and date: %s\n", asctime(local));
gm = gmtime(&t);
printf("Coordinated Universal Time and date: %s", asctime(gm));
return 0;
}