It happenned on a… 31 May

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.