Halloween is a spooky celebration that is observed every year in a number of countries on October 31. It is celebrated on the eve of the religious festival All Saint's Day, held on 1st November in European countries. Yet its roots lie in the ancient Celtic festival called Samhain - a festival celebrated by those of the Gaelic culture at the end of the harvest season. They strongly believed that dead souls come to earth on Halloween, creating trouble for the living souls. Therefore, in order to scare these evil spirits away, people would dress up like monsters. Take this opportunity to wish your loved ones a frightfully spooky Halloween!