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 Fellows and visiting scholars. IAU was founded in 1957 and is chartered by the Regents of the University of the State 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 is registered in the United States as a 501(c)(3) not-for-profit organization. It is one of the founding members of the Association of American International Colleges and Universities (AAICU), a national charter member of the Forum on Education Abroad, and members of the National Association of Foreign Student Admission (NAFSA), the College Consortium for