On February 12
No pivotal events are recorded on exactly February 12. The closest is Promulgation of the Meiji Constitution on February 11, 1889 (1 day earlier).
This week in history (Feb 9 to Feb 15)
Between 29 January and 10 February 1258, a vast Ilkhanate Mongol army led by Hulagu Khan, grandson of Genghis Khan, besieged and stormed Baghdad.
On 11 February 1889 Emperor Meiji promulgated the Constitution of the Empire of Japan, presented as a gift bestowed by the sovereign on his subjects.
On 14 February 2005 three former PayPal employees, Chad Hurley, Steve Chen and Jawed Karim, founded YouTube, a website that allowed users to upload, share and watch video freely over the internet.
After 18 days of mass protests centred on Cairo's Tahrir Square, Egyptian president Hosni Mubarak resigned on 11 February 2011, ending nearly 30 years of autocratic rule.
On 9 February 1964 the Beatles made their first live appearance on American television on The Ed Sullivan Show, performing for an audience estimated at more than 73 million viewers, a record for U.S. television at the time.