Double-dip: Welcome to the first and only day in White Sox history when there have been two no-hitters thrown. (Wikipedia)
Sept. 20, 1902 — Nixey Callahan threw the first no-hitter in franchise history as he beat the Detroit Tigers. The Sox gave him all the runs he needed by scoring three in the first inning. The Sox won it, 3-0, in Chicago.
Sept. 20, 1908 — White Sox pitcher Frank Smith tossed his second no-hitter, beating the Philadelphia A’s 1-0 in Chicago. September 20 remains the only date in franchise history where multiple no-hitters have been thrown.