The Oxford English Dictionary suggests that this day takes its name from a corruption of a derogatory term for Protestants who did not follow the doctrines of the Church of England. It was later applied to those who did not wear the traditional sprig of oak on May 29, or Royal Oak Day—the birthday of Charles II, and the day in 1660 on which he made his entry into London as king. Shick-shack has since become synonymous with the oak-apple or sprig of oak itself, and May 29 is celebrated in memory of the restoration of King Charles and his preservation in the Royal Oak. Discuss