1879 (MDCCCLXXIX) was a common year starting on Wednesday of the Gregorian calendar and a common year starting on Monday of the Julian calendar, the 1879th year of the Common Era (CE) and Anno Domini (AD) designations, the 879th year of the 2nd millennium, the 79th year of the 19th century, and the 10th and last year of the 1870s decade. As of the start of 1879, the Gregorian calendar was 12 days ahead of the Julian calendar, which remained in localized use until 1923.