This Sunday is the Feast of Christ the King, (alternatively called the Feast of the Reign of Christ). It is a relatively new addition to the liturgical calendar having been inaugurated in 1925 by Pope Pius XI and within a few decades spreading to Protestant denominations as well, including the Episcopal Church, the Lutheran Church and the Church of England among others. Although it first fell on the twenty-fifth Sunday after Pentecost, in most places currently it is celebrated on the last Sunday before Advent.
When first celebrated in England, the collect for the Sunday began “Stir up, we beseech thee, O Lord, the wills of thy faithful people…”, which proved to be a good reminder for the cooks of the house to “Stir up” the Christmas pudding, which needed to age at least a month before Christmas. Thus the last Sunday before Advent became known informally as “Stir-up Sunday.” Families would go home from church and set to work making the pudding, which required, as the custom developed, that everyone in the family have a turn at stirring the pudding, making a wish for the coming year.
The American prayer book waits for the third Sunday of Advent to use a slightly different “Stir-up” collect—“Stir up your power, O Lord, and with great might come among us…” Alas, it’s too late for the pudding to be ready in time!
If you would like to stir up an authentic British Christmas pudding this Sunday, you can find a recipe at https://en.wikipedia.org/wiki/Stir-up_Sunday.
For more about what the Kingship of Christ means for us, come to one of the services. The 10:30 is a Solemn Eucharist with incense and full choir singing the mass setting of William Walton (1902–1983).