<Tr> <Th_colspan="2"> Text of statute as originally enacted </Th> </Tr> <Tr> <Th_colspan="2"> Text of the Calendar (New Style) Act 1750 as in force today (including any amendments) within the United Kingdom, from legislation.gov.uk </Th> </Tr> <P> The Calendar (New Style) Act 1750 (c. 23) (also known as Chesterfield's Act after Philip Stanhope, 4th Earl of Chesterfield) was an Act of the Parliament of Great Britain . The Act had two parts: first, it reformed the calendar of England and the British Dominions so that the new legal year began on 1 January rather than 25 March (Lady Day); and, second, Great Britain and its Dominions adopted (in effect) the Gregorian calendar, as already used in most of western Europe . </P> <P> Chesterfield introduced the Bill into Parliament on 25 February 1751 (1750 Old Style). It was passed by the Commons on 13 May and received royal assent on 27 May 1751 . </P>

When was the gregorian calendar introduced in england