Portal:Germany/Anniversaries/June/June 30
- 1893 – Birth of politician Walter Ulbricht
- 1905 – Albert Einstein publishes On the Electrodynamics of Moving Bodies and introduces special relativity
- 1934 – In the Night of the Long Knives, the leadership of the SA is killed or arrested
- 1975 – Birth of Formula One racing driver Ralf Schumacher (pictured)