In a Quidditch match with Slytherin, Harry’s arm is broken by a rogue Bludger
Timeline
- : Ginny, Luna and Colin start at Hogwarts
- : Dobby blocks the barrier at King's Cross
- : Harry and Ron fly the car to Hogwarts
- : Ron's wand is broken
- : Cornish pixies wreak havoc in Lockhart's class
- : The Chamber of Secrets is reopened
- : The Halloween Feast and 500th Deathday for Nearly Headless Nick
- : Mrs. Norris is petrified
- : A rogue Bludger breaks Harry's arm
- : Colin Creevey petrified
- : The Duelling Club
- : Harry learns about Parselmouths
- : Justin and Nick are petrified
- : Harry sent to Dumbledore's Office, Visits the Sorting Hat and Fawkes
- : Mr and Mrs Weasley visit Bill in Egypt
- : Harry and Ron use Polyjuice to "become" Crabbe and Goyle
- : Hermione is changed partially into a cat
Sources