October. This is one of the peculiarly dangerous months to speculate in stocks in. The others are July, January, September, April, November, May, March, June, December, August, and February.
(Mark Twain [Samuel Langhorne Clemens] (1835-1910), U.S. author. "Pudd'nhead Wilson's Calendar," ch. 13, Pudd'nhead Wilson (1894).)