displaying date and time

Is there any possible way to display the date and time that my program was executed?

Code:

---

#include <stdio.h>
#include <time.h>

int main(void)
{
  time_t now = time(NULL);
  puts(asctime(localtime(&now)));
  /* [edit]
  puts(ctime(&now));
  [/edit] */
  return 0;
}

---

if you want to save it for later you can always trow it down in a file aswell.