April 8: Gudi Padwa and Ugadi in various parts of India (2016)
Heike Kamerlingh Onnes
- 1271 – The Knights Hospitaller surrendered the Krak des Chevaliers to the army of the Mamluk sultan Baibars.
- 1341 – Italian scholar and poet Petrarch took the title poet laureate at a ceremony in Rome.
- 1864 – American Civil War: A decisive Confederate victory in the Battle of Mansfield stopped the advance of the Union Army's Red River Campaign.
- 1911 – Dutch physicist Heike Kamerlingh Onnes (pictured) discovered superconductivity.
- 2008 – The wind turbines at the Bahrain World Trade Center, the first building to incorporate turbines into its design, became operational.
- More anniversaries:
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