Boxing Day?
It's British. That's all I have ever known about it.

But it is today- the day after Christmas. So I went over to that growing compendium of just about everything you will ever need to know and searched for it on the Wikipedia. What I learned is that no one knows how it started or even necessarily why. It is one of those days now lost in the mists and myths of time. Here are three of the more common explanations:

* After all the Christmas parties on December 26th, 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. 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.
--Source: Wikipedia

Whatever the origins, it is simply a work day for me. No boxes, no feudal lords, or whatever. I just planned to leave home late enough to get to work after the big crowds since my office is across the street from a major mall.