31 October

October 31 is the 304th day of the year (305th in leap years), known for being the date of Halloween. There are 61 days remaining in the year.

Events
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 * 1981: Lord Voldemort murders James and Lily Potter and is defeated for the first time when he fails to kill Harry Potter. The First Wizarding War ends.
 * 1991: The first-year Charms class topic is Wingardium Leviosa, the lifting spell. Later, the Halloween feast is interrupted by the arrival of a Mountain Troll. Harry Potter and Ron Weasley save Hermione Granger from the Troll in the girls' bathroom. Professor Quirrell attempts to steal the Philosopher's Stone, but is thwarted by Severus Snape, who is attacked by Fluffy as a result.
 * 1992: Ginny Weasley, under the influence of Tom Riddle's diary, opens the Chamber of Secrets. The basilisk that is released petrifies Mrs. Norris. Harry, Ron, Hermione also attend Nicholas de Mimsy Porpington's 500th Deathday Party.
 * 1993: Sirius Black attacks the Fat Lady, resulting in the entire Gryffindor House sleeping in sleeping bags in the Great Hall.
 * 1994: The Goblet of Fire selects the champions for the Triwizard Tournament.



Deaths

 * 1492: Sir Nicholas de Mimsy-Porpington is executed.
 * 1981: Lily Potter is murdered protecting her son from Lord Voldemort.
 * 1981: James Potter is murdered by Lord Voldemort.