In Svalbard, Norway, the Global Seed Vault celebrated its 10th anniversary by adding its one-millionth seed.
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Wyoming's Grand Teton National Park was established after being signed off by President Calvin Coolidge.
Valentinian I, also known as Valentinian the Great, ascended to the throne as the Roman emperor.
£1 notes were circulated in Britain.
The HMHS Britannic, sister to the RMS Titanic, was launched at Harland and Wolff shipyard in Belfast.
The New York Philharmonic Orchestra performed in Pyongyang, North Korea.
