Halloween, which is observed annually on October 31st, is one of the most anticipated holidays of the year. Many families begin preparing for the fun celebration, which centers around dressing up in creative costumes and collecting candy, weeks in advance by giving their homes spooky makeovers. Filmmakers use the occasion to release horror movies, while enterprising entrepreneurs cash in on the holiday with creative haunted homes, corn mazes, and hayrides. So how did an obscure holiday transform into the fun, spooky celebration that we know today? Read on.