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
Wales when local parishes would celebrate the patron saint of their local church. This celebration died out in the 19th century, to be replaced by Saint David's Day, which is celebrated on 1 March throughout Wales, and by Welsh expats around the world. Commemorating the patron saint of friendship and love, Dydd Santes Dwynwen's popularity has been increasing recently. It is celebrated on 25 January in a similar way to St Valentine's Day: by exchanging cards and by holding parties and concerts. Calan Gaeaf, associated with the supernatural and the dead, is observed on 1 November (All Saints Day). It has