Halloween is celebrated in Canada on October 31st or around the time leading up to this day. The occasion has Celtic origins and according to Celtic beliefs, spirits and the dead cross over into the world of the living on this night. To celebrate, many people host costume parties, carve pumpkins, make Halloween themed treats and decorate their houses. Many children go ‘trick-or-treating’, where they dress up in their costumes and ring doorbells in their neighborhood. The children call out “trick-or-treat” to receive candy or snacks from the person answering the door. Halloween is not a public holiday, so schools, organizations, and other businesses open as usual.