21 June

1948 - Launch of the LP record

On 21 June 1948, Columbia introduced the 33-rpm long-playing record.

1919 - Scuttling of the German fleet

On 21 June 1919, the German fleet was scuttled at Scapa Flow rather than surrendered.

1788 - US Constitution ratified

On 21 June 1788, New Hampshire ratified the Constitution, bringing it into effect.