You might have your own beliefs and assumptions, passed to you from parents or friends, about why December 26 is called Boxing Day.
There's a good chance you think it's because that's when people get rid of all their Christmas present boxes and wrapping paper. Or maybe it's because that's when you box up all your unwanted Christmas presents.
Well, it's not either of those things.
It's a day that's also become heavily associated with fox hunting - but that's got nothing to do with the name either.
It does have something to do with boxes, though.
According to Stephen Moss, writing in The Guardian, "it is generally accepted that the name derives from the giving of Christmas 'boxes' but the precise nature of those boxes and when they were first dispensed is disputed".
The giving of boxes refers to the practice of collecting for the poor with boxes, which were opened the day after Christmas, which is also St Stephen's Day.
When this practice started is disputed. Some say it can be traced back to the Victorian era, but others say it goes back much further. There are claims it dates back to the Middle Ages and even the Roman Empire, once Christianity had arrived.
Though the timing of its origins may be disputed, Moss says it was the Victorians who fleshed out the meaning of Boxing Day. The Oxford English Dictionary dates the term to the 1830s and in 1871 it became a bank holiday.
It was around this time, as a result of the growing tradition, that wealthy people gave their servants time off to visit their families. They were handed a box to take home, containing gifts, bonuses and sometimes leftover food.
A separate tradition was for tradespeople to be given 'Christmas boxes' of presents or money on the first weekday after Christmas as thanks for good service throughout the year.
Samuel Pepys mentions this practice in a diary entry from December 19th 1663: "Thence by coach to my shoemaker’s and paid all there, and gave something to the boys’ box against Christmas."
It is primarily a British tradition, though it is also practised in countries like Australia, New Zealand and Canada. It is not observed in the US.