A Christmas stamp is a postage stamp with a Christmas theme, intended for use on seasonal mail such as Christmas cards. Many countries of the world issue such stamps, which are regular postage stamps and are usually valid for postage year-round. They usually go on sale some time between early October and early December, and are printed in considerable quantities.

A Christmas card is a greeting card sent as part of the traditional celebration of Christmas in order to convey between people a range of sentiments related to Christmastide and the holiday season. Christmas cards are usually exchanged during the weeks preceding Christmas Day by many people in Western society and in Asia. The traditional greeting reads "wishing you a Merry Christmas and a Happy New Year". There are innumerable variations on this greeting, many cards expressing more religious sentiment, or containing a poem, prayer, Christmas song lyrics or Biblical verse; others focus on the general holiday season with an all-inclusive "Season's greetings". The first modern Christmas card was by John Calcott Horsley.