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
IAU College IAU College IAU (IAU); French: Institut Américain Universitaire, is an American institution of higher learning located in southern France that offers study abroad opportunities in various fields. Its main campus is in Aix-en-Provence, France, and offers satellite programs throughout Spain, Morocco, and the United Kingdom. Established in 1957, IAU was one of the first American-style, English language, liberal arts educational institutions in Western Europe. It is chartered by the Regents of the State University of New York and is recognized by the Rectorat of Aix-Marseille University and by the French Ministry of Education as a private higher education institution. IAU