1903 (MCMIII) was a common year starting on Thursday of the Gregorian calendar and a common year starting on Wednesday of the Julian calendar, the 1903rd year of the Common Era (CE) and Anno Domini (AD) designations, the 903rd year of the 2nd millennium, the 3rd year of the 20th century, and the 4th year of the 1900s decade. As of the start of 1903, the Gregorian calendar was 13 days ahead of the Julian calendar, which remained in localized use until 1923.
