Most Americans have heard of nor know of Boxing Day December 26th around the world:
“Boxing Day is a bank and public holiday in the United Kingdom, Australia, Canada, Germany, Greenland, New Zealand, Hong Kong, Nigeria and countries in the Commonwealth of Nations with a mainly Christian population. In South Africa this public holiday is now known as the Day of Goodwill. Though it is not an official holiday in the United States, the name “Boxing Day” for the day after Christmas has some currency among Americans, particularly those that live near the Canada United States border.
The name derives from the tradition of giving seasonal gifts, on the day after Christmas, to less wealthy people and social inferiors, which was later extended to various workpeople such as labourers and servants.
The traditional recorded celebration of Boxing Day has long included giving money and other gifts to charitable institutions, the needy and people in service positions. The European tradition has been dated to the Middle Ages, but the exact origin is unknown and there are some claims that it goes back to the late Roman/early Christian era; metal boxes were placed outside churches used to collect special offerings tied to the Feast of Saint Stephen.
In the United Kingdom it certainly became a custom of the nineteenth century Victorians for tradesmen to collect their “Christmas boxes” or gifts in return for good and reliable service throughout the year on the day after Christmas. The exact etymology of the term “Boxing” is unclear, with several competing theories, none of which are clearly true.
The establishment of Boxing Day as a defined public holiday under the legislation that created the UK’s Bank Holidays started the separation of ‘Boxing Day’ from the ‘Feast of St Stephen’ and today it is almost entirely a secular holiday with a tradition of shopping and post Christmas sales starting,” quoting Wikipedia.