People celebrate Christmas in different ways.
One thing that lots of people do on Boxing Day, when the festivities are all over, is head out to the shops with a wallet full of Christmas cash in the hope of scoring a bargain in the sales.
What's unfortunate, though, is that it makes life pretty miserable for retail workers at this time of year. Hoards of shoppers can be unforgiving at the best of times, but there's something about the Boxing Day sales that makes people behave even worse.
On social media, people have been sharing images and videos of huge crowds and queues of shoppers.
So people are sending retail staff solidarity for the day ahead.
If you're out on the Boxing Day sales, remember to be nice to retail workers, because it might be a half price sale, but kindness is always free.