DAYSPERLYEAR
DAYSPERNYEAR, DAYSPERLYEAR
strp = getnum(strp, &rulep->r_day, 0, DAYSPERLYEAR - 1);
int_fast32_t tdelta = idays / DAYSPERLYEAR;
while (DAYSPERLYEAR < mday) {
DAYSPERLYEAR :
DAYSPERLYEAR :
DAYSPERNYEAR, DAYSPERLYEAR
yrdays = DAYSPERLYEAR;