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) immediately. Cunningham commissioned a New York advertising agency to develop his visual concept of the "Friday the 13th" logo, which consisted of big block letters bursting through a pane of glass. In the end, Cunningham believed there were "no problems" with the title, but distributor George Mansour contends that there was an issue: "There was a movie before ours called "Friday the 13th: The Orphan". Moderately successful. But someone still threatened to sue. It is unknown whether Phil [Scuderi] paid them off, but the issue was eventually resolved." Following the success of "Friday the 13th" in 1980, Paramount Pictures began