gdate
gdate(nd, &dt);
struct date *gdate(int _nd, struct date *_dt);
return (gdate(easterodn(y), dt));
gdate(nb_date, sizeof(nb_date), not_before),
gdate(na_date, sizeof(na_date), not_after),
gdate(date, sizeof(date), ve_utc), rc);
gdate(date, sizeof(date), ve_utc));
return (gdate(nd, d));
return (gdate(nd, d));