On This Day, April 20
- 2023: SpaceX's Starship rocket, the largest and most powerful rocket ever built, launches for the first time. It explodes four minutes into flight.
- 2021: State of Minnesota v. Derek Michael Chauvin: Derek Chauvin is found guilty of all charges in the murder of George Floyd by the Fourth Judicial District Court of Minnesota.
- 2020: For the first time in history, oil prices drop below zero, an effect of the 2020 Russia-Saudi Arabia oil price war.
- 2015: Ten people are killed in a bomb attack on a convoy carrying food supplies to a United Nations compound in Garowe in the Somali region of Puntland.
- 2013: A 6.6-magnitude earthquake strikes Lushan County, Ya'an, in China's Sichuan province, killing at least 193 people and injuring thousands.