Halloween is celebrated on October 31st. To celebrate, people

often dress up as witches, ghosts and devils, or famous people such as Superman and Spiderman.
One popular Halloween activity is “trick-or treating”. Children dress up in their costumes then go to people’s houses. They knock on the door and say “trick or treat?” This means, give us a treat, or we’ll play a trick on you. Most people give candy.
American teenagers often celebrate Halloween with a costume party. They may also watch horror movies, listen to music, or tell each other ghost stories. Visiting haunted houses is also a popular activity.
The most common Halloween food is the candy apple. This is basically an apple that has been covered in sticky sugar syrup.