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 (franchise) creators wanted to tie‑in Jason's trademark hockey mask to the series, but the idea was discarded so that the show could have a chance to exist on its own. Mancuso, Jr. was afraid that mentioning any events from the films would take the audience away from "the new world that we were trying to create". The decision to name the show "Friday the 13th" over the original title was made because Mancuso, Jr. believed a ""Friday the 13th"" moniker would better help to sell the show to networks. Filming took place in Toronto, Ontario, Canada. "Friday the 13th: The Series"