DAYS_PER_400_YEARS  157 ext/calendar/gregor.c 	century = temp / DAYS_PER_400_YEARS;
DAYS_PER_400_YEARS  160 ext/calendar/gregor.c 	temp = ((temp % DAYS_PER_400_YEARS) / 4) * 4 + 3;
DAYS_PER_400_YEARS  231 ext/calendar/gregor.c 	return (((year / 100) * DAYS_PER_400_YEARS) / 4