Historical Events on December 6

20 significant historical events occurred on December 6. December 6 has been the date of various notable events over more than a century. Noteworthy on this day was the 1917 Halifax explosion in Nova Scotia, the 1921 signing of the Anglo-Irish Treaty ending the Irish War of Independence, and the "Blood in the Water" water polo match between Hungary and the USSR at the 1956 Olympics. Culturally, it saw the Rolling Stones' troubled Altamont Free Concert in 1969 and sporting events like the 2020 Sakhir Grand Prix.