February 9 is the 40th day of the year in theGregorian calendar. There are 325 days remaining until the end of the year (326 in leap years).

• 474 – Zeno crowned as co-emperor of the Byzantine Empire.
• 1555 – Bishop of Gloucester John Hooper is burned at the stake.
• 1621 – Gregory XV becomes Pope, the last Popeelected by acclamation.
• 1775 – American Revolutionary War: The British Parliament declares Massachusetts in rebellion.
• 1788 – The Habsburg Empire joins the Russo-Turkish War in the Russian camp.
• 1825 – After no presidential candidate receives a majority of electoral votes in the election of 1824, the United States House of Representatives electsJohn Quincy Adams President of the United States.
• 1849 – New Roman Republic established
• 1861 – American Civil War: Jefferson Davis is elected the Provisional President of the Confederate States of America by the Confederate convention at Montgomery, Alabama.