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September 22: Battle of Zutphen
1586 (MDLXXXVI) was a common year starting on Wednesday of the Gregorian calendar and a common year starting on Saturday of the Julian calendar, the 1586th year of the Common Era (CE) and Anno Domini (AD) designations, the 586th year of the 2nd millennium, the 86th year of the 16th century, and the 7th year of the 1580s decade. As of the start of 1586, the Gregorian calendar was 10 days ahead of the Julian calendar, which remained in localized use until 1923.