Common year starting on Friday has only one Friday the 13th; The only Friday the 13th in this common year occurs in August. Leap years starting on Thursday share this characteristic, but also have another one in February. This is the only year type where the "n"th "Doomsday" (this year Sunday) is not in ISO week "n"; it is in ISO week "n"-1. In the (currently used) Gregorian calendar, the fourteen types of year (seven common, seven leap) repeat in a 400-year cycle (20871 weeks). Forty-three common years per cycle or exactly 10.75% start on a Friday. The 28-year sub-cycle does only span across century
Friday the 13th (franchise) Bracke's book, which he had also worked on, and drew from its structure and content. "Curious Goods: Behind the Scenes of Friday the 13th: The Series" by Alyse Wax, a retrospective focusing on the 1987 television series, was released in October 2015 by BearManor Media. In May 1986, Domark released a "Friday the 13th" game for the Amstrad CPC, Commodore 64, and ZX Spectrum. The plot involved the player picking a "sanctuary" and attempting to persuade others to hide there. Jason is "disguised as a friend" until he decides to attack the player. Three years later, LJN published a game