1521: Holy Roman Emperor Charles V opens the Diet of Worms in Worms, Germany, which lasts until May 25 and produces the “Edict of Worms” denouncing Martin Luther

1807: London’s Pall Mall becomes the first street lit by gaslight

1813: Jane Austen’s “Pride and Prejudice” is published by Thomas Egerton in the United Kingdom

1819: British colonial officer Stamford Raffles lands in Singapore

1933: The name “Pakistan” is coined by Choudhry Rahmat Ali and gradually accepted by Muslims in the Indian subcontinent, who use it to push for a separate Muslim homeland in South Asia

1986: Space Shuttle Challenger explodes 73 seconds after liftoff from Cape Canaveral, killing all seven crew members, including Christa McAuliffe, who was to be the first teacher in space

Source: Onthisday.com