Program to print Local Date & Time in C

#include 
#include 
int current_day(void)
{ struct tm *local;
  time_t t;

  t = time(NULL);
  local = localtime(&t);
  return local->tm_wday;
}
int main(int argc, char *argv[])
{
  printf("Today: %d\n", current_day());
  exit(0);
}