SEC_PER_DAY
days = time / SEC_PER_DAY;
time -= (day_mon[LEAP_YR(year)][i] * SEC_PER_DAY);
days = (time / SEC_PER_DAY) + 1; /* first day is 1 */
time %= SEC_PER_DAY;
#define SEC_PER_YEAR (SEC_PER_DAY * 365)
#define SEC_PER_LYEAR (SEC_PER_DAY * 366)