Mischief night is a tradition in some parts of the world ; a night when people do mischief to their neighbors . Mischief Night ( also known as Devil 's Night , Hell Night , Cabbage Night , Gate Night , and Mizzy Night and Miggy Night ) is an annual tradition in parts of England , Canada , and the United States when people ( primarily teenagers and preteens ) take a degree of license to play pranks and do mischief in their neighborhoods .