The European Union Parliament declared single-use plastics were to be banned by 2021.
The world's largest dinosaur footprint was discovered.
The UK issued a new 12-sided £1 coin into circulation.
The strain of swine flu known as H1N1 had its first case in the US.
Bank of Tokyo and Mitsubishi Bank merged to become the world's largest bank.
A nuclear disaster occurred at Three Mile Island in Pennsylvania, US.
Stanley Kramer became the first person to receive a star on the Hollywood Walk of Fame.
The term ''Big Bang" was coined by Fred Hoyle in a radio interview.
An Imperial Airways passenger aircraft crashed in Belgium, killing all fifteen on board.
Frenchman Henri Fabre flew the world's first seaplane in Martinique, France.
The world's first weightlifting championship took place in London, England.
The Vienna Philharmonic Orchestra performed its first concert.
The Treaty of Florence was signed, which ended the war between the French Republic and the Kingdom of Naples.
Roman Emperor Valentinian I made his brother, Flavius Valens, his co-emperor.
