1961 (MCMLXI) was a common year starting on Sunday of the Gregorian calendar, the 1961st year of the Common Era (CE) and Anno Domini (AD) designations, the 961st year of the 2nd millennium, the 61st year of the 20th century, and the 2nd year of the 1960s decade. Its rendering using the Hindu-Arabic numeral system creates a numeral which looks the same when put upside down. The next such year will be 6009.