1632 (MDCXXXII) was a leap year starting on Thursday of the Gregorian calendar and a leap year starting on Sunday of the Julian calendar, the 1632nd year of the Common Era (CE) and Anno Domini (AD) designations, the 632nd year of the 2nd millennium, the 32nd year of the 17th century, and the 3rd year of the 1630s decade. As of the start of 1632, the Gregorian calendar was 10 days ahead of the Julian calendar, which remained in localized use until 1923.