A traditional date to make the Christmas Pudding on the Sunday before the start of Advent.
Stir-up Sunday is a centuries-old annual tradition where home-cooks spend the last Sunday before Advent ‘stirring up’ their Christmas pudding. That means it’s not on the same date each year and falls somewhere at the end of November before Advent begins.
Rather than a cooking term, Stir-up Sunday gets its name from the beginning of the collect for the day in the Book of Common Prayer, which begins with the words, “Stir up, we beseech thee, O Lord, the wills of thy faithful people; that they, plenteously bringing forth the fruit of good works, may of thee be plenteously rewarded; through Jesus Christ our Lord. Amen.”. But it has become associated with the custom of making the Christmas puddings on that day as it served as a timely reminder to make the traditional Christmas food.