Old Style (O.S.) 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 was to change the start of the year from Lady Day (25 March) to 1 January; the second was to discard the Julian calendar in favour of the Gregorian calendar. Closely related is the custom of dual dating, 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 Roman Catholic countries. This change was implemented subsequently in Protestant and Orthodox countries, usually at much later dates. In England and Wales, Ireland, and the British colonies, the change to the start of the year and the changeover from the Julian calendar occurred in 1752 under the Calendar (New Style) Act 1750. In Scotland, 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. Thus "New Style" can either refer to the start of year adjustment, or to the adoption of the Gregorian calendar.
In Russia, new style dates came into use in early 1918. Other countries in Eastern Orthodoxy adopted new style dating for their civil calendars but most continue to use the Julian calendar for religious use. In English-language histories of other countries (especially Russia), the Anglophone OS/NS convention is often used to identify which calendar is being used when giving a date.
When recording British history it is usual to use the dates recorded at the time of the event,[a] 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 New Year's Day in the Julian calendar).
From 1155 to 1752, the civil or legal year in England began on 25 March (Lady Day) so for example the execution of Charles I was recorded at the time in parliament as happening on 30 January 1648 (Old Style). In newer English language texts this date is usually shown as "30 January 1649" (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", a form of dual dating 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 The History of Parliament).
Through the enactment of the British Calendar (New Style) Act 1750 and of the Irish Parliament's Calendar (New Style) Act, 1750, Great Britain, Ireland and the British Empire (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 rioters demanded "Give us our eleven days" grew out of a misinterpretation of a painting by William Hogarth. The British tax year traditionally began on Lady Day (25 March) on the Julian calendar and this became 5 April, which was the "New Style" equivalent. A 12th skipped Julian leap day in 1800 changed its start to 6 April. It was not changed when a 13th Julian leap day was skipped in 1900, so the tax year in the United Kingdom still begins on 6 April.
The European colonies of the Americas adopted the new style calendar when their mother countries did. In what is now the continental United States, the French and Spanish possessions did so before the British colony. In Alaska, the change took place after the United States purchased Alaska from Russia. Friday, 6 October 1867 was followed by Friday, 18 October. Instead of 12 days, only 11 were skipped, and the day of the week was repeated on successive days, because at the same time the International Date Line was moved, from following Alaska's eastern border with Canada to following its new western border, now with Russia.
It is common in English language publications to use the familiar Old Style and/or New Style terms when discussing events and personalities in other countries, especially with reference to the Russian Empire and the very-early Russian Soviet. For example, in the article "The October (November) Revolution" the Encyclopædia Britannica uses the format of "25 October (7 November, New Style)" to describe the date of the start of the revolution.
When this usage is encountered, the British adoption date is not necessarily intended. The 'start of year' change and the calendar system change were not always adopted concurrently. Similarly, civil and religious adoption may not have happened at the same time (or even at all). In the case of Eastern Europe, for example, all of these assumptions would be incorrect.
Usually, the mapping of new dates onto old dates with a start of year adjustment works well with little confusion for events which happened before the introduction of the Gregorian calendar. For example, the Battle of Agincourt is well known to have been fought on 25 October 1415, which is Saint Crispin's Day. But for the period between the first introduction of the Gregorian calendar on 15 October 1582 and its introduction in Britain on 14 September 1752, there can be considerable confusion between events in continental western Europe and in British domains. Events in continental western Europe are usually reported in English language histories using the Gregorian calendar. For example, the Battle of Blenheim is always given as 13 August 1704. However confusion occurs when an event involves both. For example, William III of England arrived at Brixham in England on 5 November (Julian calendar), after setting sail from the Netherlands on 11 November (Gregorian calendar), in 1688.
The Battle of the Boyne in Ireland took place a few months later on 1 July 1690 (Julian calendar). This maps to 11 July (Gregorian calendar), conveniently close to the Julian date of the subsequent (and more decisive) Battle of Aughrim on 12 July 1691 (Julian). This latter battle was commemorated annually throughout the 18th century on 12 July, following the usual historical convention of commemorating events of that period within Great Britain and Ireland by mapping the Julian date directly onto the modern Gregorian calendar date (as happens for example with Guy Fawkes Night on 5 November). The Battle of the Boyne was commemorated with smaller parades on 1 July. However, the two events were combined in the late 18th century, and continue to be celebrated as "The Twelfth".
Because of the differences, British writers and their correspondents often employed two dates, dual dating, more or less automatically. For this reason, letters concerning diplomacy and international trade sometimes bore both Julian and Gregorian dates to prevent confusion: for example, Sir William Boswell writing to Sir John Coke from The Hague dated a letter "12/22 Dec. 1635". In his biography of Dr John Dee, The Queen's Conjurer, Benjamin Woolley surmises that because Dee fought unsuccessfully for England to embrace the 1583/84 date set for the change, "England remained outside the Gregorian system for a further 170 years, communications during that period customarily carrying two dates". In contrast, Thomas Jefferson, who lived at the time that the British Isles and colonies eventually converted to the Gregorian calendar, instructed that his tombstone bear his date of birth using the Julian calendar (notated O.S. for Old Style) and his date of death using the Gregorian calendar. At Jefferson's birth the difference was eleven days between the Julian and Gregorian calendars; thus his birthday of 2 April in the Julian calendar is 13 April in the Gregorian calendar. Similarly, George Washington is nowadays officially reported as having been born on 22 February 1732, rather than on 11 February 1731/32 (Julian calendar).
There is some evidence that the calendar change was not easily accepted. Many British people continued to celebrate their holidays "Old Style" well into the 19th century,[b] a practice that according to the author Karen Bellenir reveals a deep emotional resistance to calendar reform.
The change arose from the realisation that the correct figure for the number of days in a year is not 365.25 (365 days 6 hours) as assumed by the Julian calendar but rather less: the Julian calendar has too many leap years. The consequence was that the basis for calculation of the date of Easter as decided in the 4th century had drifted from reality. The Gregorian calendar reform also dealt with the accumulated difference between these figures, between the years 325 and 1582 (1752 in the British Empire), by skipping 10 days (11 in the case of Great Britain, including its colonies and Ireland) to restore the date of the vernal equinox to approximately 21 March, the approximate date it occurred at the time of the First Council of Nicea in 325.
For a ready reckoner to assist in converting O.S. dates to N.S. and vice versa, see this table.
Events from the year 1752 in Ireland.1752 in Russia
Events from the year 1752 in RussiaAdoption of the Gregorian calendar
The adoption of the Gregorian Calendar was an event in the modern history of most nations and societies, marking a change from their traditional (or old style) dating system to the modern (or new style) dating system that is widely used around the world today. Some countries adopted the new calendar from 1582, some did not do so before the early twentieth century, and others did so at various dates between; however a number continue to use a different civil calendar. For many the new style calendar is only used for civil purposes and the old style calendar remains used in religious contexts. Today, the Gregorian calendar is the world's most widely used civil calendar. During – and for some time after – the change between systems, it has been common to use the terms Old Style and New Style when giving dates, to indicate which calendar was used to reckon them.
The Gregorian calendar was decreed in 1582 by the papal bull Inter gravissimas by Pope Gregory XIII, to correct a divergence in the canonical date of the [northern] spring equinox from observed reality (due to an error in the Julian system) that affected the calculation of the date of Easter. Although Gregory's reform was enacted in the most solemn of forms available to the Church, the bull had no authority beyond the Catholic Church and the Papal States. The changes he was proposing were changes to the civil calendar, over which he had no formal authority. They required adoption by the civil authorities in each country to have legal effect.
The bull became the canon law of the Catholic Church in 1582, but it was not recognised by Protestant churches, Eastern Orthodox Churches, and a few others. Consequently, the days on which Easter and related holidays were celebrated by different Christian churches again diverged.Battle of Sofia
For the duplicated dates in this article, see Old Style and New Style dates.The Battle of Sofia (Bulgarian: Битката при София) was the culmination of Russian General Iosif Gurko's Western Squad for the defeat of the Orkhanie army in the Russo-Turkish War (1877-1878). It led to the Liberation of Sofia from Turkish rule.Century leap year
In the Gregorian calendar, a year ending in "00" that is divisible by 400 is a century leap year, with the intercalation of February 29 yielding 366 days instead of 365. Century years (divisible by 100) that are not divisible by 400 are not leap years but common years of 365 days. For example, the years 1600, 2000, and 2400 are century leap years since those numbers are divisible by 400, while 1700, 1800, 1900, 2100, 2200, and 2300 are common years despite being divisible by 4. Leap years divisible by 400 always start on a Saturday; thus the leap day February 29 in those years always falls on a Tuesday (dominical letter BA).
The Gregorian calendar yields an average year that currently tracks the annual revolution period of the Earth more closely than the older Julian calendar, in which every fourth year (including end-of-century years) is a leap year. The Julian formula adds too many leap days (3 every 400 years), causing the Julian calendar to drift gradually with respect to the astronomical seasons. Over time, natural events such as the spring equinox began to occur earlier and earlier in the Julian calendar.
The Gregorian calendar was introduced in 1582, but was adopted by various countries over several centuries, with the result that some countries still used the older Julian calendar while others used the Gregorian calendar. Dates prior to 1582 are generally calculated using the Julian calendar, and different countries have different conventions about dates between 1582 and their adoption of the Gregorian calendar. (See, for example, Old Style and New Style dates.)Circa
Circa (from Latin, meaning 'around, about') – frequently abbreviated c., ca. or ca and less frequently circ. or cca. – signifies "approximately" in several European languages and as a loanword in English, usually in reference to a date. Circa is widely used in historical writing when the dates of events are not accurately known.
When used in date ranges, circa is applied before each approximate date, while dates without circa immediately preceding them are generally assumed to be known with certainty.
1732–1799: Both years are known precisely.
c. 1732 – 1799: The beginning year is approximate; the end year is known precisely.
1732 – c. 1799: The beginning year is known precisely ; the end year is approximate.
c. 1732 – c. 1799: Both years are approximate.Date
Date or dates may refer to:
Date (fruit), the fruit of the date palm (Phoenix dactylifera)Dual dating
Dual dating is the practice, in historical materials, to indicate some dates with what appears to be duplicate, or excessive digits, sometimes separated by a hyphen or a slash. This is also often referred to as double dating. The need for double dating arose from the transition from an older calendar to a newer one. For example, in "10/21 February 1750/51", the dual day of the month is due to the correction for excess leap years in the Julian calendar by the Gregorian calendar, and the dual year is due to some countries beginning their numbered year on 1 January while others were still using another date.
In English language histories and some contemporary documents, the terms "Old Style" (OS) and "New Style" (NS) are sometimes added to dates to identify which calendar is/was being used for the given date . (For details see the article Old Style and New Style dates).
The Latin equivalents, which are used in many languages, are stili veteris (genitive) or stilo vetere (ablative), abbreviated st.v. and respectively meaning "(of) old style" and "(in) old style", and stili novi or stilo novo, abbreviated st.n. and meaning "(of/in) new style". The Latin abbreviations may be capitalised differently by different users, e.g., St.n. or St.N. for stili novi. There are equivalents for these terms in other languages as well, such as the German a.St. ("alten Stils" for O.S.).Era (geology)
A geologic era is a subdivision of geologic time that divides an eon into smaller units of time. The Phanerozoic Eon is divided into three such time frames: the Paleozoic, Mesozoic, and Cenozoic (meaning "old life", "middle life" and "recent life") that represent the major stages in the macroscopic fossil record. These eras are separated by catastrophic extinction boundaries, the P-T boundary between the Paleozoic and the Mesozoic and the K-Pg boundary between the Mesozoic and the Cenozoic. There is evidence that catastrophic meteorite impacts played a role in demarcating the differences between the eras.
The Hadean, Archean and Proterozoic eons were as a whole formerly called the Precambrian. This covered the four billion years of Earth history prior to the appearance of hard-shelled animals. More recently, however, the Archean and Proterozoic eons have been subdivided into eras of their own.
Geologic eras are further subdivided into geologic periods, although the Archean eras have yet to be subdivided in this way.Floruit
Floruit (UK: , US: ), abbreviated fl. (or occasionally flor.), Latin for "he/she flourished", denotes a date or period during which a person was known to have been alive or active. In English, the word may also be used as a noun indicating the time when someone flourished.Geologic Calendar
The Geologic Calendar is a scale in which the geological lifetime of the earth is mapped onto a calendrical year; that is to say, the day one of the earth took place on a geologic January 1 at precisely midnight, and today's date and time is December 31 at midnight. On this calendar, the inferred appearance of the first living single-celled organisms, prokaryotes, occurred on a geologic February 25 around 12:30pm to 1:07pm, dinosaurs first appeared on December 13, the first flower plants on December 22 and the first primates on December 28 at about 9:43pm. The first Anatomically modern humans did not arrive until around 11:48 p.m. on New Year's Eve, and all of human history since the end of the last ice-age occurred in the last 82.2 seconds before midnight of the new year.Geological period
A geological period is one of the several subdivisions of geologic time enabling cross-referencing of rocks and geologic events from place to place.
These periods form elements of a hierarchy of divisions into which geologists have split the Earth's history.
Eons and eras are larger subdivisions than periods while periods themselves may be divided into epochs and ages.
The rocks formed during a period belong to a stratigraphic unit called a system.Gregorian calendar
The Gregorian calendar is the most widely used civil calendar in the world. It is named after Pope Gregory XIII, who introduced it in October 1582. The calendar spaces leap years to make the average year 365.2425 days long, approximating the 365.2422-day tropical year that is determined by the Earth's revolution around the Sun. The rule for leap years is:
Every year that is exactly divisible by four is a leap year, except for years that are exactly divisible by 100, but these centurial years are leap years if they are exactly divisible by 400. For example, the years 1700, 1800, and 1900 are not leap years, but the year 2000 is.
The calendar was developed as a correction to the Julian calendar, shortening the average year by 0.0075 days to stop the drift of the calendar with respect to the equinoxes. To deal with the 10 days' difference (between calendar and reality) that this drift had already reached, the date was advanced so that 4 October 1582 was followed by 15 October 1582. There was no discontinuity in the cycle of weekdays or of the Anno Domini calendar era. The reform also altered the lunar cycle used by the Church to calculate the date for Easter (computus), restoring it to the time of the year as originally celebrated by the early Church.
The reform was adopted initially by the Catholic countries of Europe and their overseas possessions. Over the next three centuries, the Protestant and Eastern Orthodox countries also moved to what they called the Improved calendar, with Greece being the last European country to adopt the calendar in 1923. To unambiguously specify a date during the transition period, dual dating is sometimes used to specify both Old Style and New Style dates. Due to globalization in the 20th century, the calendar has also been adopted by most non-Western countries for civil purposes. The calendar era carries the alternative secular name of "Common Era".Gresham Professor of Physic
The Professor of Physic (the term for medicine at the time the post was created in 1597) at Gresham College in London, England, gives free educational lectures to the general public on medicine, health and related sciences. The college was founded to give public lectures in 1596 / 7 (Old Style and New Style dates). Professors of Physic and more recently visiting Professors have been giving public lectures on major topics in medicine in London since 1597; recently these have also been put on line as a free resource for a wider public including outside the UK. Gresham Professors have included some of the leading scientists in Britain including Sir Christopher Wren and Robert Boyle. Gresham Professors of Physic listed below included leaders in medicine, public health, surgery and clinical science. In addition eminent medical scientists and physicians were Gresham Professors of other disciplines, such as Sir William Petty, one of the founders of demography (Gresham Professor of Music from 1651).
The Professor of Physic is always appointed by the Mercers' Side of the Joint Grand Gresham Committee, a body administered jointly by the Worshipful Company of Mercers and the City of London Corporation.List of Head Masters of Eton College
This is a list of Head Masters of Eton College since 1442.
Note: for explanation of alternative year dates in this list, such as '1494/5', see Old Style and New Style dates.New Year
New Year is the time or day at which a new calendar year begins and the calendar's year count increments by one.
Many cultures celebrate the event in some manner and the 1st day of January is often marked as a national holiday.
In the Gregorian calendar, the most widely used calendar system today, New Year occurs on January 1 (New Year's Day). This was also the case both in the Roman calendar (at least after about 713 BC) and in the Julian calendar that succeeded it.
Other calendars have been used historically in different parts of the world; some calendars count years numerically, while others do not.
During the Middle Ages in western Europe, while the Julian calendar was still in use, authorities moved New Year's Day, depending upon locale, to one of several other days, including March 1, March 25, Easter, September 1, and December 25. Beginning in 1582, the adoptions of the Gregorian calendar and changes to the Old Style and New Style dates meant the various local dates for New Year's Day changed to using one fixed date, January 1.
The widespread official adoption of the Gregorian calendar and marking January 1 as the beginning of a new year is almost global now. Regional or local use of other calendars continues, along with the cultural and religious practices that accompany them. In Latin America, various native cultures continue the observation of traditions according to their own calendars. Israel, China, India, and other countries continue to celebrate New Year on different dates.Samuel Crossman
Samuel Crossman (1623 – 4 February 1683) was a minister of the Church of England and a hymn writer. He was born at Bradfield Monachorum, now known as Bradfield St George, Suffolk, England.
Crossman earned a Bachelor of Divinity at Pembroke College, University of Cambridge, and was Prebendary of Bristol. After graduation, he ministered to both an Anglican congregation at All Saints, Sudbury, and to a Puritan congregation simultaneously. Crossman sympathised with the Puritan cause, and attended the 1661 Savoy Conference, which attempted to update the Book of Common Prayer so that both Puritans and Anglicans could use it. The conference failed, and the 1662 Act of Uniformity expelled Crossman along with some 2,000 other Puritan-leaning ministers from the Church of England. He renounced his Puritan affiliations shortly afterwards, and was ordained in 1665, becoming a royal chaplain. He received a post at Bristol in 1667, and became Dean of Bristol Cathedral in 1683. He died on 4 February 1683 (O.S.; 1684 N.S. – see Old Style and New Style dates), at Bristol, and lies buried in the south aisle of the cathedral at Bristol.
Several of Crossman's hymns are preserved in the Sacred Harp.Stefan Dragutin
Stefan Dragutin (Serbian: Стефан Драгутин, Hungarian: Dragutin István; c. 1244 – 12 March 1316) was King of Serbia from 1276 to 1282. From 1282, he ruled a separate kingdom which included northern Serbia, and (from 1284) the neighboring Hungarian banates (or border provinces), for which he was unofficially styled as "King of Syrmia". He was the eldest son of King Stefan Uroš I of Serbia and Helen of Anjou. He received the title of "young king" in token of his right to succeed his father after a peace treaty between Uroš I and Béla IV of Hungary who was the grandfather of Dragutin's wife, Catherine, in 1268. He rebelled against his father and forced him to abdicate with Hungarian assistance in 1282.
Dragutin abandoned Uroš I's centralizing policy and ceded large territories to his mother in appanage. After a riding accident, he abdicated in favor of his brother, Milutin in 1282, but he retained the northern regions of Serbia along the Hungarian border. Two years later, his brother-in-law, Ladislaus IV of Hungary, granted him three banates—Mačva (or Sirmia ulterior), Usora and Soli—to him. He was the first Serbian monarch to rule Belgrade. With his brother's support, he also occupied the Banate of Braničevo in 1284 or 1285.
Dragutin was in theory a vassal both to his brother (for his Serbian territories), and to the Hungarian monarchs (for the four banates), but he actually ruled his realm as an independent ruler from the 1290s. His conflicts with Milutin developed into an open war in 1301 and he made frequent raids against the neighboring Hungarian lords from 1307. Most of the Serbian noblemen supported Dragutin, but he was forced to make peace with Milutin after Milutin's mercenaries routed him in 1311 or 1312. Before his death, he entered into a monastery and died as the monk Teokist. In the list of Serbian saints, Dragutin is venerated on 12 November or 30 October (Old Style and New Style dates).Stratotype
A stratotype or type section is a geological term that names the physical location or outcrop of a particular reference exposure of a stratigraphic sequence or stratigraphic boundary. If the stratigraphic unit is layered, it is called a stratotype, whereas the standard of reference for unlayered rocks is the type locality.