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. As MAD Magazine pointed out on its cover for the March 1961 issue, this was the first "upside-up" year — i.e., one in which the numerals that form the year look the same as when the numerals are rotated upside down, a strobogrammatic number — since 1881. The next such year will be 6009.