Determination of the day of the week row C) to find the dominical letter that is E. The letter for September 18 is B, so the day of the week is Thursday. Use 16 (in the Julian century row, column E) and 76 (in row D) to find the dominical letter that is A. February 23 is a "D" day, so the day of the week is Wednesday. In a handwritten note in a collection of astronomical tables, Carl Friedrich Gauss described a method for calculating the day of the week for 1 January in any given year. He never published it. It was finally included in
Dydd Santes Dwynwen ways to celebrate the feast besides sending cards, for example, organize a love-themed gig, set up a singles night, prepare a romantic meal and perhaps compose a love poem to read at the local pub. The Welsh often celebrate with concerts and parties, and exchange Dydd Santes Dwynwen greetings cards. This version of the story is generally told to younger children, usually in primary school or nursery as it is generally considered the most appropriate for children. Dwynwen was the beautiful daughter of Brychan Brycheiniog, who was said to have had eleven sons and twenty-four daughters (although these figures vary