December 1, 1931: Soviet Union institutes new six-day week policy, allowing workers and children one day off (marked in blue) for every five days workedHattie Caraway sworn into office as United States Senator for Arkansas, only the second woman to hold office in the U.S. SenateDecember 5, 1931: Soviet government tears down Moscow's Cathedral of Christ the Savior to make way for planned Palace of the Soviets, never constructed