The following events occurred in the year 1975:
- 1 September: Gilderoy Lockhart is Sorted into Ravenclaw.
- James Potter, Sirius Black and Peter Pettigrew become Animagi, thus officially naming themselves the Marauders, along with Remus Lupin.Template:Fact
- James Potter, Sirius Black, Remus Lupin and Peter Pettigrew create the Marauder's Map.Template:Fact
- Mundungus Fletcher is banned from the Hog's Head.Template:Fact
- Hairy Snout, Human Heart, by an anonymous author, is published by Whizz Hard Books.Template:Fact
- The Decree Number 189.OL5 is passed, probably by the Department of Magical Education.Template:Fact