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) Left", Cunningham wanted "Friday the 13th" to be more of a "roller-coaster ride." The original screenplay was tentatively titled "A Long Night at Camp Blood". While working on a redraft of the screenplay, Cunningham proposed the title "Friday the 13th", after which Miller began redeveloping. Cunningham rushed out to place an advertisement in "Variety" using the "Friday the 13th" title. Worried that someone else owned the rights to the title and wanting to avoid potential lawsuits, Cunningham thought it would be best to find out immediately. He commissioned a New York advertising agency to develop his concept of the "Friday