"Friday the 13th" is considered an unlucky day in many cultures, often associated with superstitions and fears. The combination of Friday, a day historically linked to bad luck, and the number 13, which is often viewed as ominous, contributes to this belief. Many people avoid making important decisions or engaging in risky activities on this day. The fear of Friday the 13th is known as triskaidekaphobia. This superstition has been popularized in modern culture through movies, books, and media, particularly the Friday the 13th film series featuring the character Jason Voorhees. These portrayals have reinforced the day's reputation as a time for horror and misfortune.