 If family or friends want to send you holiday gifts and cards, have them ship early, so they can arrive by Christmas. If you're on a ship or overseas, the priority mail deadline is December 10th, but for zip codes starting with 093, it is December 3rd. International mail for Africa, Central and South America should be sent by December 2nd. For the rest of the world, the International Mail deadline is December 9th. Get information on wait limits and restrictions and all the shipping deadlines online or at your local military post office.