Issue 9198 of the, covering the calendar change in Great Britain. The date heading reads: 'From Tuesday September 1, O.S. To Saturday September 16, N.S.

Old Style ( O.S. Mantrajet 1100 Driver there. ) and New Style ( N.S.) are terms sometimes used with dates to indicate that the calendar convention used at the time described is different from that in use at the time the document was being written. There were two calendar changes in Great Britain and its colonies, which may sometimes complicate matters: the first change was to change the start of the year from (25 March) to 1 January; the second was to discard the in favour of the. Closely related is the custom of, where writers gave two consecutive years to reflect differences in the starting date of the year, or to include both the Julian and Gregorian dates. Beginning in 1582, the Gregorian calendar replaced the Julian in countries. This change was implemented subsequently in and countries, usually at much later dates. In,, and the British colonies, the change of the start of the year and the changeover from the Julian calendar occurred in 1752 under the.

In, the legal start of the year had already been moved to 1 January (in 1600), but Scotland otherwise continued to use the Julian calendar until 1752. So 'New Style' can either refer to the, or to the. Memorial plaque to John Etty in, recording his date of death as 28 January 170 8 / 9 When recording British history it is usual to use the dates recorded at the time of the event, with the year adjusted to start on 1 January. But the start of the Julian year was not always 1 January, and was altered at different times in different countries (see ). From 1155 to 1752, the civil or legal year in England began on 25 March () so for example the execution of was recorded at the time in Parliament as happening on 30 January 164 8 (Old Style). In modern English language texts this date is usually shown as '30 January 164 9' (New Style).

The corresponding date in the Gregorian calendar is 9 February 1649, the date by which his contemporaries in some parts of continental Europe would have recorded his execution. The O.S./N.S. Designation is particularly relevant for dates which fall between the start of the 'historical year' (1 January) and the official start date, where different. This was 25 March in England, Wales and the Colonies until 1752. During the years between the first introduction of the Gregorian calendar in continental Europe and its introduction in Britain, contemporary usage in England started to change.

In Britain 1 January was celebrated as the New Year festival, but the 'year starting 25th March was called the Civil or Legal Year, although the phrase Old Style was more commonly used.' To reduce misunderstandings about the date, it was normal in parish registers to place a new year heading after 24 March (for example '1661') and another heading at the end of the following December, '1661/62', to indicate that in the following few weeks the year was 1661 Old Style but 1662 New Style. Some more modern sources, often more academic ones, also use the '1661/62' style for the period between 1 January and 25 March for years before the introduction of the Gregorian calendar in England. (See for example ).

Scotland [ ] Scotland had already partly made the change: its calendar year had begun on 1 January since 1600. Adoption of the Gregorian calendar [ ]. Painting: ( c. Sony Vegas Pro 10 Portable Mega there. 1755), which is the main source for 'Give us our Eleven Days'. Through the enactment of the Irish Parliament's Calendar (New Style) Act, 1750, and the British, Ireland, and the (including much of what is now the eastern part of the United States) adopted the Gregorian calendar in 1752, by which time it was necessary to correct by 11 days. Wednesday, 2 September 1752, was followed by Thursday, 14 September 1752. Claims that grew out of a misinterpretation of a painting.