Boxing Day is December 26, and the term is of “uncertain origin” although it is generally associated with giving gifts to those who serve:

In Britain, it was a custom for tradesmen to collect “Christmas boxes” of money or presents on the first weekday after Christmas as thanks for good service throughout the year. This is mentioned in Samuel Pepys’diary entry for 19 December 1663. This custom is linked to an older British tradition where the servants of the wealthy were allowed the next day to visit their families since they would have to serve their masters on Christmas Day. The employers would give each servant a box to take home containing gifts, bonuses, and sometimes leftover food. (https://en.m.wikipedia.org/wiki/Boxing_Day)

With that definition, for most of us, Christmas Day is Boxing Day with all those presents! In our house, we always say we’re going to get the shopping done early, and even if some of it is done early, June is assessing up to the last minute if we have bought “enough” for our growing family (four adult children, eight grandchildren). 

Some trace Christmas gift-giving to the wise men, who, as I say as often as I can, were not at the manger on the night Jesus was born but saw him later at a house:

When they saw the star, they rejoiced exceedingly with great joy. And going into the house they saw the child with Mary his mother, and they fell down and worshiped him. Then, opening their treasures, they offered him gifts, gold and frankincense and myrrh. (Matthew 2.10, 11, ESV, emphasis mine)

In this country, most of us are blessed to be able to give, and we give because we are blessed. We have the example of the Jewish people when they were delivered from genocide as told in the book of Esther. 

And Mordecai recorded these things and sent letters to all the Jews who were in all the provinces of King Ahasuerus, both near and far, obliging them to keep the fourteenth day of the month Adar and also the fifteenth day of the same, year by year, as the days on which the Jews got relief from their enemies, and as the month that had been turned for them from sorrow into gladness and from mourning into a holiday; that they should make them days of feasting and gladness, days for sending gifts of food to one another and gifts to the poor. (Esther 9.20 – 22, ESV, emphasis mine)

Thanks be to God for his inexpressible gift! (2 Corinthians 9.15, ESV)