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 (1980 film) across the United States, ultimately expanding its release to 1,127 theaters. It earned $5,816,321 in its opening weekend, before finishing domestically with $39,754,601, with a total of 14,778,700 admissions. It was the 18th highest-grossing film that year, facing competition from other high-profile horror releases such as "The Shining", "Dressed To Kill", "The Fog", and "Prom Night". The worldwide gross for the film was $59,754,601. Of the seventeen films distributed by Paramount in 1980, only two: "Urban Cowboy" and "Airplane!", returned more profits than "Friday the 13th". "Friday the 13th" was released internationally, which was unusual for an independent film with,