PACK2             334 ext/date/date_core.c     (x)->pc = PACK2(_mon, _mday);\
PACK2             423 ext/date/date_core.c     (x)->pc = PACK2(EX_MON((y)->pc), EX_MDAY((y)->pc));\
PACK2            1169 ext/date/date_core.c 	x->s.pc = PACK2(m, d);