On this day: October 23

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October 23: Mole Day

Marco Simoncelli in 2011​

• 1157 – The Battle of Grathe Heath ended the Danish Civil War.
• 1906 – Alberto Santos-Dumont flew his biplane 14-bis for 50 metres (160 ft) at an altitude of about four metres (13 ft).
• 1956 – The Hungarian Revolution began as a peaceful student demonstration that attracted thousands while marching through central Budapest to the parliament building.
• 2011 – During the Malaysian motorcycle Grand Prix, Marco Simoncelli (pictured) collided with two other riders, resulting in his death due to serious trauma to the head, neck, and chest.

• Stefano Franscini (b. 1796)
• Emilia Clarke (b. 1986)
• Bill Nicholson (d. 2004)
• Otto Barch (d. 2025)

More anniversaries:

• October 22
• October 23
• October 24

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