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
Wall Street Crash of 1929 when the Dow Jones Industrial Average fell 22.6%, was worse in percentage terms than any single day of the 1929 crash (although the combined 25% decline of October 28–29, 1929 was larger than October 19, 1987, and remains the worst two-day decline ever). The American mobilization for World War II at the end of 1941 moved approximately ten million people out of the civilian labor force and into the war. World War II had a dramatic effect on many parts of the economy, and may have hastened the end of the Great Depression in the United States. Government-financed capital spending