1846 followed by 1847
1846 (MDCCCXLVI) was a common year starting on Thursday of the Gregorian calendar and a common year starting on Tuesday of the Julian calendar, the 1846th year of the Common Era (CE) and Anno Domini (AD) designations, the 846th  year of the 2nd millennium, the 46th  year of the 19th century, and the  7th   year of the 1840s decade. As of the start of 1846, the Gregorian calendar was 12 days ahead of the Julian calendar, which remained in localized use until 1923.