4 June is the 155th day of the year (156th in leap years). There are 210 days remaining until the end of the year.
- 1992: The final day of first year exams, the last one being History of Magic. In the evening, Harry Potter, Ron Weasley, and Hermione Granger follow Quirinus Quirrell through the trapdoor in the Forbidden Corridor, which leads them into a series of Underground Chambers with obstacles to get to the Philosopher's Stone. Harry Potter learns Lord Voldemort lives within Quirrell and seeks the Philosopher's Stone in order to create a new body. Harry successfully defeats Voldemort, which results in Quirrell's death.