General fact: 40 is the customary number of hours in a regular workweek in some Western countries.
Mathematical fact: 40 is the only number whose letters are in alphabetical order.
Trivia: 40 is the number of attempts needed before the creation of the "water displacing" substance in the spray WD-40.
Historical date: February 9th is the day in 1889 that President Grover Cleveland signs a bill elevating the United States Department of Agriculture to a Cabinet-level agency.