Divorced from the promise of 'treats', Mischief Night is entirely based around tricks - from the simply ringing doorbells and running to the throwing of eggs at windows or hedge-hopping. Originally it is thought that the mischief was played as part of May Day celebrations but moved nearer to Bonfire Night as populations became urbanised in the 18th and 19th centuries.
The precise date actually varies from place to place. In Yorkshire, Mischief Night (also known sometimes as 'Miggy Night' or 'Mischievous Night') is/was traditionally held on the night before Bonfire Night. In other parts of the country, the tradition is held on the night before Hallowe'en.