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) King, who recounted the making of the film to fans. As of 2018, "Friday the 13th" has spawned ten sequels, including a crossover film with "A Nightmare on Elm Street" villain Freddy Krueger. "Friday the 13th Part 2" (1981) introduced Jason Voorhees, the son of Mrs. Voorhees, as the primary antagonist, which would continue for the remaining sequels (with exception of the fifth movie) and related works. Most of the sequels were filmed on larger budgets than the original. For comparison, "Friday the 13th" had a budget of $550,000, while the first sequel was given a budget of $1.25 million.