Wikipedia: "Boxing Day is a public holiday in the United Kingdom, Canada, New Zealand and Australia, as well as many other members of the Commonwealth of Nations and Greece. It is based on the tradition of giving gifts to the less fortunate members of society (...) It is usually celebrated on 26 December, the day after Christmas Day; however, its associated public holiday can be moved to the next weekday if 26 December is a Saturday or Sunday.
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A Christmas box is, in English tradition, a clay box used in artisan shops. Apprentices, masters, visitors, customers, and others would put donations of money into the box, like a piggy bank, and then, after Christmas, the box would be shattered and all the contents shared among the workers of the shop. Thus, masters and customers could donate bonuses to the workers anonymously, and the employees could average their wages. The habit of breaking the Christmas box lent its name to Boxing Day. The term "Christmas box" now refers generally to a gift or pay bonus given to workers."
