Alaska Earthquake

 On 27 March 1964 (local time) Alaska was struck by an earthquake It measured 9.2 on the Richter Scale and killed 131 people. Earthquake Damage Pics from Earthquakes.usgs.gov

Whitby

 My friend wrote a history of Whitby 

The Slave Trade Ends

On 25 March 1807 Britain abolished the slave trade. (The first country to abolish it was Denmark in 1792).

Hungover

You sometimes read that we say 'hungover' because drunk people slept hung over ropes. It's not true. That is not the origin of the term hungover. 

Tea Bag

 According to legend Thomas Sullivan invented the tea bag in 1908. But it seems that tea bags gradually developed and it's difficult to say who first invented them.

Women's Olympiad

 The Women's Olympiad began on 24 March 1921. It was the first international women's sports event.

Cathcold Tower, Southampton

 During World War II an anti-aircraft gun was placed on Catchcold Tower in Southampton. It was the last time the Medieval walls played a part in the defence of the city.