Friday the 13th etc.) of the year. Any month that starts on a Sunday contains a Friday the 13th, and there is at least one Friday the 13th in every calendar year. There can be as many as three Friday the 13ths in a single calendar year; either in February, March and November in a common year starting on Thursday (such as 2009, 2015 or 2026) (D), or January, April and July in a leap year starting on Sunday (such as 2012) (AG). The longest period that occurs without a Friday the 13th is 14 months, either from July to September the following
Black Friday (1945) Black Friday (1945) On 9 February 1945, a force of Allied Bristol Beaufighter aircraft suffered many losses, during an attack on the German destroyer "Z33" and its escorting vessels; the operation was called "'Black Friday'" by the Allied survivors. The German ships were sheltering in a strong defensive position in Førde Fjord, Norway, forcing the Allied aircraft to attack through massed anti-aircraft fire. The Beaufighters and their escort of Mustang Mk III fighters from 65 Squadron RAF, were intercepted by twelve Focke-Wulf Fw 190s of "Jagdgeschwader 5" (Fighter Wing 5) of the "Luftwaffe". The Allies damaged at least two of