Friday the 13th one occurrence each. A Friday the 13th occurs during any month that begins on a Sunday. The fear of the number 13 has been given a scientific name: "triskaidekaphobia"; and on analogy to this the fear of Friday the 13th is called "paraskevidekatriaphobia", from the Greek words "Paraskeví" (Παρασκευή, meaning "Friday"), and "dekatreís" (δεκατρείς, meaning "thirteen"). The superstition surrounding this day may have arisen in the Middle Ages, "originating from the story of Jesus' last supper and crucifixion" in which there were 13 individuals present in the Upper Room on the 13th of Nisan Maundy Thursday, the night before his
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,