31 (1870)

1870 (MDCCCLXX) was a common year starting on Saturday of the Gregorian calendar and a common year starting on Thursday of the Julian calendar, the 1870th year of the Common Era (CE) and Anno Domini (AD) designations, the 870th year of the 2nd millennium, the 70th year of the 19th century, and the 1st year of the 1870s decade. As of the start of 1870, the Gregorian calendar was 12 days ahead of the Julian calendar, which remained in localized use until 1923.