Gregorian date

Proleptic Gregorian calendar

But for the period between 15 October 1582 and 14 September 1752 (the date of its legal introduction in the British Empire), a significant risk of misunderstanding arises in English language texts. (The equivalent issue arises in Russian (until 1917) and Greek (until 1923) language texts.) This can happen when the same event has two different dates (which may even have a different year number): one as recorded using the Gregorian date in (some) continental European histories and the other using the Julian date in English history sources. Even then, events that happened on the Continent are usually reported in English language histories according to the local convention where the event occurred, so usually the Gregorian calendar. For example, the Battle of Blenheim is always given as 13 August 1704. Confusion may occur when an event affects both. For example, William III of England set sail from the Netherlands on 11 November 1688 (Gregorian calendar) and arrived at Brixham in England on 5 November 1688 (Julian calendar).