933 (CMXXXIII) was a common year starting on Tuesday of the Julian calendar, the 933rd year of the Common Era (CE) and Anno Domini (AD) designations, the 933rd year of the 1st millennium, the 33rd year of the 10th century, and the 4th year of the 930s decade. As of the start of 933, the Gregorian calendar was 5 days ahead of the Julian calendar, which was the dominant calendar of the time.

• 15 March – Henry the Fowler defeats the Magyars in the Battle of Riade.
• Cotentin and Jersey are taken by William I, Duke of Normandy.
• The Kingdom of Lower Burgundy is given to King Rudolph II of Upper Burgundy.

• King Alfonso IV of Leon
• December 15 – Li Siyuan, Emperor Mingzong of Later Tang