Wikipedia:Selected anniversaries/January 30
- 1649 – English Civil War: King Charles I was beheaded for high treason in front of the Banqueting House in London.
- 1826 – The Menai Suspension Bridge connecting the island of Anglesey and the mainland of Wales, one of the world's first modern suspension bridges, opened.
- 1930 – The world's first radiosonde, a device attached to weather balloons to measure various atmospheric parameters, was launched by meteorologist Pavel Molchanov in Pavlovsk, USSR.
- 1948 – Nathuram Godse shot Mahatma Gandhi (pictured), political and spiritual leader of India and the Indian independence movement, to death at Birla House in Delhi.
- 1968 – Vietnam War: Forces of the Viet Cong and the Vietnam People's Army launched the Tết Offensive on Tết (Vietnamese New Year's Day) to strike military and civilian command and control centers throughout South Vietnam.
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