It happened on a… May 31

2021

China's ruling Communist Party announces it will allow married couples to have three children, in effort to boost falling birthrates.

Psy's “Gangnam Style” becomes the first video to reach 2 billion views on YouTube.

British children's cartoon “Peppa Pig” created by Astley Baker Davies premieres.

“Harry Potter and the Prisoner of Azkaban”, the 3rd film based on the books by J. K. Rowling is released.

John Lennon and Yoko Ono record “Give Peace a Chance”.

The first talking Mickey Mouse cartoon, “The Karnival Kid”, is released.

Battle of Jutland: Largest naval battle of World War I between the British Grand Fleet and the German High Seas Fleet which killed 8,645.

Dr. John Harvey Kellogg patented “flaked cereal.”

1st electric railway opens at Berlin Trades Exposition.

E.J. DeSemdt patented asphalt.

In London, Big Ben went into operation.