In case you were wondering,
Boxing Day is a public holiday observed in British 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.
There is much dispute over the true origins of Boxing Day, but one common story of the holiday's origins is that servants used to receive Christmas gifts from their employers on the first weekday after Christmas, the day after the family celebrations. These were generally called their Christmas boxes. Another story is that this is the day that priests broke open the collection boxes and distributed the money to the poor.
There is some debate as to the true origin of the name of Boxing Day. Several theories & explanations sound credible.