Halloween is a holiday that is celebrated on October 31st every year. It is known for its spooky and festive atmosphere, with people dressing up in costumes, decorating their homes with jack-o-lanterns and other creepy decorations, and going trick-or-treating for candy. The holiday is rooted in ancient Celtic traditions, which were later incorporated into Christian traditions such as All Saints' Day. Today, Halloween is enjoyed by people of all ages, with parties, parades, and other events held in many communities around the world.