Over the centuries, differing churches and sects of Christianity have changed the actual traditions, time frame and their interpretations. St. Stephen’s Day (or Boxing Day), for example, is 26 December in the Western Church and 27 December in the Eastern Church. Boxing Day, the first weekday after Christmas, is observed as a legal holiday in parts of the Commonwealth of Nations. 28 December is Childermas or the Feast of the Innocents. Currently, the twelve days and nights are celebrated in widely varying ways around the world. For example, some give gifts only on Christmas Day, some only on Twelfth Night, and some each of the twelve nights.
So enjoy the season!