1910 (MCMX) was a common year starting on Saturday of the Gregorian calendar and a common year starting on Friday of the Julian calendar, the 1910th year of the Common Era (CE) and Anno Domini (AD) designations, the 910th year of the 2nd millennium, the 10th year of the 20th century, and the 1st year of the 1910s decade. As of the start of 1910, the Gregorian calendar was 13 days ahead of the Julian calendar, which remained in localized use until 1923.