Fatto matematico: 966 is the Stirling number of the second kind S(8,3).
Trivia: 966 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Data storica: August 23rd is the day in 1514 that Battle of Chaldiran ended with a decisive victory for the Sultan Selim I, Ottoman Empire, over the Shah Ismail I, Safavids founder.