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Halloween is observed annually on the night of 31 October. It is believed to have originated primarily as a Celtic celebration marking the division of the light and dark halves of the year, when the boundary between the living and the dead was believed to be at its thinnest. Halloween customs, such as wearing disguises to ward off ghosts and offering food to appease malevolent spirits, were brought to Canada in the mid-to-late 1800s by Irish and Scottish immigrants.
