Example image of eyePlorer eyePlorer map for 'Old Style and New Style dates': Calendar (New Style) Act 1750 Kingdom of Great Britain Battle of Hastings 12th century Charles I of England Lady Day Julian calendar Gregorian calendar Orthodox Church Catholic Church Habsburg Spain History of Italy (1559–1814) Iberian Union Polish–Lithuanian Commonwealth Leap year Early Modern France French Republican Calendar Russian Empire Soviet Union October Revolution Encyclopædia Britannica Miguel de Cervantes William Shakespeare England Battle of Austerlitz Napoleon I of France Battle of Agincourt Crispin Battle of Blenheim Brixham Netherlands William III of England Battle of the Boyne Battle of Aughrim Orange Institution Protestantism The Twelfth Dual dating John Dee Thomas Jefferson China Korean Empire Meiji period Lunisolar calendar Arabic numerals Japanese era name Heisei period Qing Dynasty Korean calendar Chinese calendar