Boxing Day

Boxing Day is a public holiday observed in many Commonwealth countries on 26 December. In many European countries it is also a holiday, called St. Stephen's Day or the Second Day of Christmas. Depending on its origin, it may have traditionally been strictly defined as the first weekday after Christmas [1]. However, in recent years Boxing Day has been almost universally accepted as 26 December [2], although its associated public holiday may fall on a different day.
Boxing Day is often celebrated by giving gifts and donations to the poor and needy.
In some Commonwealth countries, fixed-date holidays falling on Saturday or Sunday are often observed on the next weekday, so if Boxing Day falls on a Saturday then Monday 28 December is a public holiday; while, if Christmas Day is a Saturday then both Monday 27 December and Tuesday 28 December will be public holidays.

There is great dispute over the true origins of Boxing Day. The more common stories include:
Centuries ago, merchants would present their servants food and fruits as a form of Yuletide tip. Naturally, the gifts of food and fruit were packed in boxes, hence the term "Boxing Day".
In feudal times, Christmas was a reason for a gathering of extended families. All the serfs would gather their families in the manor of their lord, which made it easier for the lord of the estate to hand out annual stipends to the serfs. After all the Christmas parties on December 26, the lord of the estate would give practical goods such as cloth, grains, and tools to the serfs who lived on his land. Each family would get a box full of such goods the day after Christmas. Under this explanation, there was nothing voluntary about this transaction; the lord of the manor was obliged to supply these goods. Because of the boxes being given out, the day was called Boxing Day.
In Britain many years ago, it was common practice for the servants to carry boxes to their employers when they arrived for their day's work on the day after Christmas (December 25). Their employers would then put coins in the boxes as special end-of-year gifts. This can be compared with the modern day concept of Christmas bonuses. The servants carried boxes for the coins, hence the name Boxing Day.
In churches, it was traditional to open the church's donation box on Christmas day, and the money in the donation box was to be distributed to the poorer or lower class citizens on the next day. In this case, the "box" in "Boxing Day" comes from that one gigantic lockbox in which the donations were left.
In Britain because many servants had to work for their employers on Christmas day they would instead open their presents (i.e., boxes) the next day, which therefore became known as Boxing Day.

Boxing Day in the UK is traditionally a day for sporting activity, originally fox hunting, but in modern times football and horseracing.
In Canada, and indeed any other country that celebrates it, Boxing Day is also observed as a public holiday, and is a day when stores sell their excess Christmas inventory at significantly reduced prices. Boxing Day has become so important for retailers that they often extend it into a "Boxing Week". This occurs similarly in Australia and New Zealand.
In Australia, a test match starting on December 26 is called the Boxing Day Test Match, and is played at the Melbourne Cricket Ground before the largest crowd of the summer.