Devil’s Night, the night before Halloween when local kids cause havoc, has a colourful contemporary history – while mischief has been part of Halloween for time immemorial, the practice of causing mayhem the night before Halloween is a little more modern. There are a number of local traditions: the most famous Devil’s Night happens in Detroit, where 800 fires were started in 1984, prompting a wide community response to patrol the streets. There are also much more benign traditions, such as Quebec’s “Mat Night,” when local children steal their neighbours’ door mats, and Cabbage Night in the Northeastern US, where…