1814 (MDCCCXIV) was a common year starting on Saturday of the Gregorian calendar and a common year starting on Thursday of the Julian calendar, the 1814th year of the Common Era (CE) and Anno Domini (AD) designations, the 814th year of the 2nd millennium, the 14th year of the 19th century, and the 5th year of the 1810s decade. As of the start of 1814, the Gregorian calendar was 12 days ahead of the Julian calendar, which remained in localized use until 1923.