- Kendra Dumbledore, Albus's mother, dies early in the Summer of 1899 due to an accidental explosion conjured by his sister Ariana.
- Albus Dumbledore becomes extremely close with Grindelwald during the Summer of 1899. There's a LOT that goes on during these brief few months. Dumbledore and Grindelwald become obsessed with the Deathly Hallows and even plan to start a revolution where wizards would rule the world.
- The Dumbledore brothers and Grindelwald get into a three-way duel after the latter inflicts a Cruciatus Curse on Aberforth. Ariana dies while trying to intervene.