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 ("I have lived", implying death in the present), an omen of bad luck. In fact, in Italy, 13 is generally considered a lucky number. However, due to Americanization, young people consider Friday the 13th unlucky as well. The 2000 parody film "Shriek If You Know What I Did Last Friday the Thirteenth" was released in Italy with the title "Shriek – Hai impegni per venerdì 17?" (""Shriek – Do You Have Something to Do on Friday the 17th?""). Friday the 17th occurs on a month starting on Wednesday. According to the Stress Management Center and Phobia Institute in Asheville, North