what are all of the dates for the games?
september 30, 1956, october 7, 1956, october 14, 1956, october 21, 1956, october 28, 1956, november 4, 1956, november 11, 1956, november 18, 1956, november 25, 1956, december 2, 1956, december 9, 1956, december 16, 1956
which game dates had attendance in the 20,000's?
october 21, 1956, december 2, 1956
of these, which day had the lowest attendance
december 2, 1956