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Glastonbury Thorn

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93-515: The Glastonbury thorn is a form of common hawthorn, Crataegus monogyna 'Biflora' (sometimes incorrectly called Crataegus oxyacantha var. praecox ), found in and around Glastonbury , Somerset , England. Unlike ordinary hawthorn trees, it flowers twice a year (hence the name " biflora "), the first time in winter and the second time in spring. The trees in the Glastonbury area have been propagated by grafting since ancient times. The tree

186-642: A leap day being added to February in the leap years . The months and length of months in the Gregorian calendar are the same as for the Julian calendar. The only difference is that the Gregorian reform omitted a leap day in three centurial years every 400 years and left the leap day unchanged. A leap year normally occurs every four years: the leap day, historically, was inserted by doubling 24 February – there were indeed two days dated 24 February . However, for many years it has been customary to put

279-645: A 'Panegiricall entertainement' for Anne of Denmark , King James I's consort, in which the character of Joseph of Arimathea presented the Queen with boughs from both the Thorn and the Walnut, in memory of 'ruinated Glastonbury'. Royal interest in the Thorn, however, made it a very suspect symbol to the growing number of Puritans who saw Christmas as a Catholic survival, and some feared that the Stuarts were intending to restore

372-458: A European hawthorn now included in C. monogyna, but that name is illegitimate under the rules of botanical nomenclature . Other common names include may , mayblossom , maythorn , (as the plant generally flowers in May) quickthorn , whitethorn , motherdie , and haw . The common hawthorn is a shrub or small tree up to about 10 metres (33 feet) tall, with a dense crown. The bark

465-407: A closely argued, 800-page volume. He would later defend his and Lilius's work against detractors. Clavius's opinion was that the correction should take place in one move, and it was this advice that prevailed with Gregory. The second component consisted of an approximation that would provide an accurate yet simple, rule-based calendar. Lilius's formula was a 10-day correction to revert the drift since

558-623: A computation for the date of Easter that achieved the same result as Gregory's rules, without actually referring to him. Britain and the British Empire (including the eastern part of what is now the United States) adopted the Gregorian calendar in 1752. Sweden followed in 1753. Prior to 1917, Turkey used the lunar Islamic calendar with the Hijri era for general purposes and the Julian calendar for fiscal purposes. The start of

651-413: A few days or weeks later. On 1 April 2012 a sapling grafted from a descendant of the pre-1951 specimen was planted by the landowners working with Glastonbury Conservation Society and consecrated, but it was snapped in half and irreparably damaged 16 days later. In May 2019 the tree was entirely removed by the land owner. Many have tried to grow the Glastonbury thorn from seed and direct cuttings, but in

744-518: A horizontally irregular shape on the ground. A study in Wales indicated that current levels of overgrazing by sheep might extirpate the species in 60-70 years. The fruit of hawthorn, called haws, are edible raw but commonly made into jellies, jams, syrups, or wine, or to add flavour to brandy. The petals are also edible, as are the leaves, which if picked in spring when still young are tender enough to be used in salads. Hawthorn petals are used in

837-486: A major feature in the town calendar. The thorn also featured on British postage stamps on the 12p and 13p Christmas stamps in 1986. The Glastonbury thorn was once again attacked and its branches cut off, in this case the 1951 specimen that was growing on Wearyall Hill on the southwestern side of the town, on 9 December 2010. In March 2011, it was reported that a new shoot had appeared on the damaged tree. However, as these new shoots came up they would suspiciously disappear

930-537: A sign of divine favour. This legend, like that of Joseph's arrival itself, fell foul both of regime change (the Stuart dynasty was replaced in 1689) and by the new scholarship of the Age of Reason. Both Joseph and the Thorn were relegated to the status of popular folklore, where, however, they flourished. An anonymous chapbook called The History of that Holy Disciple Joseph of Arimathea went through at least 34 editions during

1023-467: A single style; they are moderately fragrant. The flowers are white, frequently pink pollinated by midges , bees, and other insects, and later in the year bear numerous haws. The haw is a small, oval, dark red fruit about 10 mm long, berry -like, but structurally a pome containing a single seed within a stone, the pyrene . The haws develop in groups of two or three along smaller branches. They are pulpy and delicate in taste. The common hawthorn

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1116-425: Is ⁠365 + 97 / 400 ⁠ days = 365.2425 days, or 365 days, 5 hours, 49 minutes and 12 seconds. The Gregorian calendar was a reform of the Julian calendar. It was instituted by papal bull Inter gravissimas dated 24 February 1582 by Pope Gregory XIII, after whom the calendar is named. The motivation for the adjustment was to bring the date for the celebration of Easter to the time of year in which it

1209-473: Is 365.2425463 days. As the average length of a Julian year is 365.25 days, the Julian year is almost 11 minutes longer than the mean tropical year. The discrepancy results in a drift of about three days every 400 years. Lilius's proposal resulted in an average year of 365.2425 days (see Accuracy ). At the time of Gregory's reform there had already been a drift of 10 days since the Council of Nicaea, resulting in

1302-433: Is a good firewood , which burns with a good heat and little smoke. Numerous hybrids exist, some of which are used as garden shrubs. The most widely used hybrid is C. × media ( C. monogyna × C. laevigata ), of which several cultivars are known, including the very popular 'Paul's Scarlet' with dark pink double flowers. Other garden shrubs that have sometimes been suggested as possible hybrids involving

1395-403: Is a source of antioxidant phytochemicals , especially extracts of hawthorn leaves with flowers. Common hawthorn is extensively planted as a hedge plant, especially for agricultural use. Its spines and close branching habit render it effectively livestock- and human-proof, with some basic maintenance. The traditional practice of hedgelaying is most commonly practised with this species. It

1488-411: Is a species of flowering plant in the rose family Rosaceae . It is native to Europe, northwestern Africa, and Western Asia, but has been introduced in many other parts of the world. This species is one of several that have been referred to as Crataegus oxyacantha , a name that has been rejected by the botanical community as too ambiguous. In 1793, Medikus published the name C. apiifolia for

1581-580: Is also widely called the holy thorn , though this term strictly speaking refers to the original (legendary) tree. It is associated with legends about Joseph of Arimathea and the arrival of Christianity in Britain, and has appeared in written texts since the medieval period. A flowering sprig is sent to the British Monarch every Christmas. The original tree has been propagated several times, with one tree growing at Glastonbury Abbey and another in

1674-520: Is distinguished from the related but less widespread Midland hawthorn ( C. laevigata ) by its more upright growth, the leaves being deeply lobed, with spreading lobes, and the flowers having just one style, not two or three. They are interfertile, however, so hybrids occur frequently; they are only entirely distinct in their more typical forms. The pomes of some other hawthorns may have up to five seeds. Ireland and Britain The mountains are very young in

1767-541: Is dull brown with vertical orange cracks. The younger stems bear sharp thorns, about 12.5 millimetres ( 1 ⁄ 2 inch) long. The leaves are 20 to 40 mm ( 3 ⁄ 4 to 1 + 1 ⁄ 2  in) long, obovate , and deeply lobed, sometimes almost to the midrib, with the lobes spreading at a wide angle. The upper surface is dark green above and paler underneath. The hermaphrodite flowers are produced in late spring (May to early June in its native area) in corymbs of 5–25 together; numerous red stamens and

1860-495: Is informed, sells them for a crown a piece, or as he can get." The tree in the grounds of the church was pronounced dead in June 1991, and cut down the following February. However, many cuttings were taken from it before its destruction. The pre-1991 thorn in the grounds of Glastonbury Church is said to be a cutting from the original plant which was planted in secret after the original was destroyed. Now only trees budded or grafted from

1953-467: Is the change from the Julian calendar to the Gregorian calendar as enacted in various European countries between 1582 and the early 20th century. In England , Wales , Ireland , and Britain's American colonies , there were two calendar changes, both in 1752. The first adjusted the start of a new year from Lady Day (25 March) to 1 January (which Scotland had done from 1600), while the second discarded

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2046-423: Is the year using astronomical year numbering , that is, use 1 − (year BC) for BC years. ⌊ x ⌋ {\displaystyle \left\lfloor {x}\right\rfloor } means that if the result of the division is not an integer it is rounded down to the nearest integer. The general rule, in years which are leap years in the Julian calendar but not the Gregorian, is: Up to 28 February in

2139-869: The Battle of Agincourt is universally considered to have been fought on 25 October 1415 which is Saint Crispin 's Day. Usually, the mapping of new dates onto old dates with a start of year adjustment works well with little confusion for events that happened before the introduction of the Gregorian calendar. 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 in English language histories. Events in continental western Europe are usually reported in English language histories as happening under

2232-555: The Council of Trent authorised Pope Paul III to reform the calendar, requiring that the date of the vernal equinox be restored to that which it held at the time of the First Council of Nicaea in 325 and that an alteration to the calendar be designed to prevent future drift. This would allow for more consistent and accurate scheduling of the feast of Easter. In 1577, a Compendium was sent to expert mathematicians outside

2325-521: The Eastern Anatolian region of Turkey . Therefore, the trees in the region multiply with seeds. Haws are important for wildlife in winter, particularly thrushes and waxwings ; these birds eat the haws and disperse the seeds in their droppings. Due to excessive animal grazing in the area, new shoots of vulnerable Crataegus monogyna trees in the open field are eaten by animals. This does not allow them to grow and causes them to take

2418-537: The Roman Republic and the Roman Empire was the consular year, which began on the day when consuls first entered office—probably 1 May before 222 BC, 15 March from 222 BC and 1 January from 153 BC. The Julian calendar, which began in 45 BC, continued to use 1 January as the first day of the new year . Even though the year used for dates changed, the civil year always displayed its months in

2511-454: The papal bull Inter gravissimas issued by Pope Gregory XIII , which introduced it as a modification of, and replacement for, the Julian calendar . The principal change was to space leap years differently so as to make the average calendar year 365.2425 days long, more closely approximating the 365.2422-day 'tropical' or 'solar' year that is determined by the Earth's revolution around

2604-731: The 'Sacred Tree' of the British Isles in pre-Christian times, and in the twentieth century its legends helped to anchor the mythologies of the New Age. Every Christmas, the Vicar and the Mayor of Glastonbury sent a budded branch of the Glastonbury thorn to The King. Christmas cuttings are known to have been sent to both Charles I and Charles II, but the modern tradition dates from 1929, when the Vicar of Glastonbury, Lionel Smithett Lewis, sent one to Queen Mary and King George V. The event has become

2697-938: The Catholic faith. The Puritan cause was strong in Somerset, and when civil war broke out the royal reaction was particularly severe. The Thorn was chopped down by a zealous Parliamentary soldier, probably in 1647. Although destroyed, the Thorn retained some symbolic resonance for the royalist underground during the years of the Commonwealth, both in England and in the exiled Stuart court. It features in Wenceslaus Hollar's celebrated engraving of Glastonbury, commissioned for Sir William Dugdale's controversial survey of England's ruined monasteries, Monasticon Anglicanum , published in 1655. The restoration of Charles II in 1660

2790-460: The Council of Nicaea was corrected by a deletion of 10 days. The Julian calendar day Thursday, 4 October 1582 was followed by the first day of the Gregorian calendar, Friday, 15 October 1582 (the cycle of weekdays was not affected). A month after having decreed the reform, the pope (with a brief of 3 April 1582) granted to one Antoni Lilio the exclusive right to publish the calendar for a period of ten years. The Lunario Novo secondo la nuova riforma

2883-401: The Council of Nicaea, and the imposition of a leap day in only 97 years in 400 rather than in 1 year in 4. The proposed rule was that "years divisible by 100 would be leap years only if they were divisible by 400 as well". The 19-year cycle used for the lunar calendar required revision because the astronomical new moon was, at the time of the reform, four days before the calculated new moon. It

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2976-573: The Glastonbury legend, among them two other holy thorns in the grounds of St John's. The blossom sent to the King now comes from one of these. At the end of term, the pupils of St John's Infants School gather round the tree in St John's parish churchyard on the High Street. They sing carols, including one specially written for the occasion, and the oldest pupil has the privilege of cutting the branch of

3069-482: The Glastonbury thorn kept to the Julian calendar or the new one: Glastonbury.—A vast concourse of people attended the noted thorn on Christmas-day, new style; but, to their great disappointment, there was no appearance of its blowing, which made them watch it narrowly the 5th of January, the Christmas-day, old style, when it blowed as usual. Interest in the Thorn amongst 'respectable' society revived during

3162-582: The Glastonbury thorn that is then taken to London and presented to His Majesty The King. In 1965, the Queen erected a wooden cross at Glastonbury with the following inscription: "The cross, the symbol of our faith, the gift of Queen Elizabeth II, marks a Christian sanctuary so ancient that only legend can record its origin." 51°08′53″N 2°42′58″W  /  51.148°N 2.716°W  / 51.148; -2.716 Crataegus monogyna Many, including: Crataegus monogyna , known as common hawthorn , one-seed hawthorn , or single-seeded hawthorn ,

3255-496: The Gregorian calendar, but Britain used the Julian calendar). This coincidence encouraged UNESCO to make 23 April the World Book and Copyright Day . Astronomers avoid this ambiguity by the use of the Julian day number . For dates before the year 1, unlike the proleptic Gregorian calendar used in the international standard ISO 8601 , the traditional proleptic Gregorian calendar (like the older Julian calendar) does not have

3348-409: The Gregorian calendar. D = ⌊ Y / 100 ⌋ − ⌊ Y / 400 ⌋ − 2 , {\displaystyle D=\left\lfloor {Y/100}\right\rfloor -\left\lfloor {Y/400}\right\rfloor -2,} where D {\displaystyle D} is the secular difference and Y {\displaystyle Y}

3441-551: The Gregorian calendar. For example, the Battle of Blenheim is always given as 13 August 1704. Confusion occurs 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). Shakespeare and Cervantes seemingly died on exactly the same date (23 April 1616), but Cervantes predeceased Shakespeare by ten days in real time (as Spain used

3534-514: The Julian algorithm had caused the calendar to drift such that the March equinox was occurring well before its nominal 21 March date. This date was important to the Christian churches because it is fundamental to the calculation of the date of Easter . To reinstate the association, the reform advanced the date by 10 days: Thursday 4 October 1582 was followed by Friday 15 October 1582. In addition,

3627-520: The Julian calendar in favour of the Gregorian calendar, removing 11 days from the September 1752 calendar to do so. To accommodate the two calendar changes, writers used dual dating to identify a given day by giving its date according to both styles of dating. For countries such as Russia where no start of year adjustment took place, O.S. and N.S. simply indicate the Julian and Gregorian dating systems. Many Eastern Orthodox countries continue to use

3720-480: 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. There were two reasons to establish the Gregorian calendar. First, the Julian calendar assumed incorrectly that

3813-645: The United Kingdom, is known as the Hethel Old Thorn , and is located in the churchyard in the small village of Hethel , south of Norwich, in Norfolk. It is reputed to be more than 700 years old, having been planted in the thirteenth century. Gregorian calendar The Gregorian calendar is the calendar used in most parts of the world. It went into effect in October 1582 following

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3906-522: The Victorian era. Renewed interest in Christmas, coupled with a greater sense of moral responsibility, part of the romantic backlash against the perceived soul-lessness of industrialism and urbanisation. New legends began to appear at the end of the nineteenth century, amid new curiosity and speculation about the inhabitants and customs of prehistoric Britain. Some suggested that the Thorn may have been

3999-483: The architect of the Gregorian calendar, noted that the tables agreed neither on the time when the Sun passed through the vernal equinox nor on the length of the mean tropical year. Tycho Brahe also noticed discrepancies. The Gregorian leap year rule (97 leap years in 400 years) was put forward by Petrus Pitatus of Verona in 1560. He noted that it is consistent with the tropical year of the Alfonsine tables and with

4092-403: The arrival of Christianity in Britain, and the first literary source to place him in Britain appeared in the thirteenth century. The historicity of Joseph's presence in Glastonbury remains controversial, but the thorn is first mentioned in a pamphlet published by Richard Pynson in 1520 called Lyfe of Joseph of Armathie , which was almost certainly commissioned by Glastonbury Abbey. In this account,

4185-461: The average solar year is exactly 365.25 days long, an overestimate of a little under one day per century, and thus has a leap year every four years without exception. The Gregorian reform shortened the average (calendar) year by 0.0075 days to stop the drift of the calendar with respect to the equinoxes . Second, in the years since the First Council of Nicaea in AD 325, the excess leap days introduced by

4278-430: The calendar being converted from , add one day less or subtract one day more than the calculated value. Give February the appropriate number of days for the calendar being converted into . When subtracting days to calculate the Gregorian equivalent of 29 February (Julian), 29 February is discounted. Thus if the calculated value is −4 the Gregorian equivalent of this date is 24 February. The year used in dates during

4371-462: The change a few months later: 9 December was followed by 20 December. Many Protestant countries initially objected to adopting a Catholic innovation; some Protestants feared the new calendar was part of a plot to return them to the Catholic fold. For example, the British could not bring themselves to adopt the Catholic system explicitly: the Annexe to their Calendar (New Style) Act 1750 established

4464-444: The churchyard for eighty years. It was planted by Mr George Chislett, then head gardener of Glastonbury Abbey. He also learned how to graft holy thorn cuttings onto the root of blackthorn stock, and so preserve the "miraculous" Christmas blossoming characteristic. His son, Wilf, sent Glastonbury thorn cuttings all over the world, including to Washington, Canada, New Zealand and Australia. Trees survive from earlier grafts to perpetuate

4557-637: The churchyard of the Church of St John . The "original" Glastonbury thorn was cut down and burned as a relic of superstition during the English Civil War , and one planted on Wearyall Hill in 1951 to replace it had its branches cut off in 2010. According to legend, Joseph of Arimathea visited Glastonbury with the Holy Grail and thrust his staff into Wearyall Hill, which then grew into the original thorn tree. Early writers do not connect Joseph to

4650-482: The common hawthorn, include the various-leaved hawthorn of the Caucasus , which is only very occasionally found in parks and gardens. In pre-modern Europe, hawthorn was used as a symbol of hope, and also as a charm against witchcraft and vampires . Hawthorn was believed by some to have the ability to inhibit intruding supernatural forces, and was also thought to be sacred in nature due to an association between

4743-457: The eighteenth century, and although the texts often differ the chapbook always ends with a description of the Thorn, "a most miraculous Curiosity", which attracted "Thousands of People, of different Opinions" to Glastonbury every year. At the time of the adoption of the revised Gregorian calendar in Britain in 1752, the Gentleman's Magazine reported that curious visitors went to see whether

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4836-482: The extra day at the end of the month of February, adding a 29 February for the leap day. Before the 1969 revision of its General Roman Calendar , the Catholic Church delayed February feasts after the 23rd by one day in leap years; masses celebrated according to the previous calendar still reflect this delay. Gregorian years are identified by consecutive year numbers. A calendar date is fully specified by

4929-419: The fiscal year was eventually fixed at 1 March and the year number was roughly equivalent to the Hijri year (see Rumi calendar ). As the solar year is longer than the lunar year this originally entailed the use of "escape years" every so often when the number of the fiscal year would jump. From 1 March 1917 the fiscal year became Gregorian, rather than Julian. On 1 January 1926, the use of the Gregorian calendar

5022-478: The hawthorn bush and the crown of thorns that, according to the New Testament , was placed on Jesus . As protection against witchcraft, hawthorn was sometimes placed in the cradles of infants, or around houses and doorways. The Greeks reportedly placed pieces of hawthorn in casement windows to prevent witches from entering houses, while Bohemians placed hawthorn on the thresholds of cow houses for

5115-528: The increasing divergence between the canonical date of the equinox and observed reality. Easter is celebrated on the Sunday after the ecclesiastical full moon on or after 21 March, which was adopted as an approximation to the March equinox. European scholars had been well aware of the calendar drift since the early medieval period. Bede , writing in the 8th century, showed that the accumulated error in his time

5208-488: The later part of the 20th century all attempts reverted to the normal hawthorn type, flowering only in spring. This tree has been widely propagated by grafting or cuttings, with the cultivar name 'Biflora' or 'Praecox'. An early antiquarian account by Mr Eyston was given in Hearne's History and Antiquities of Glastonbury, 1722 : "There is a person about Glastonbury who has a nursery of them, who, Mr. Paschal tells us he

5301-455: The law of the Catholic Church in 1582, but it was not recognised by Protestant Churches , Eastern Orthodox Churches , Oriental Orthodox Churches , and a few others. Consequently, the days on which Easter and related holidays were celebrated by different Christian Churches again diverged. On 29 September 1582, Philip II of Spain decreed the change from the Julian to the Gregorian calendar. This affected much of Roman Catholic Europe, as Philip

5394-524: The mean tropical year of Copernicus ( De revolutionibus ) and Erasmus Reinhold ( Prutenic tables ). The three mean tropical years in Babylonian sexagesimals as the excess over 365 days (the way they would have been extracted from the tables of mean longitude) were 0;14,33,9,57 (Alfonsine), 0;14,33,11,12 (Copernicus) and 0;14,33,9,24 (Reinhold). In decimal notation, these are equal to 0.24254606, 0.24255185, and 0.24254352, respectively. All values are

5487-552: The medieval English recipe for spinee, an almond milk -based pottage recorded in The Forme of Cury by the head chef of King Richard II , c.  1390 . C. monogyna is one of the most common species used as the "hawthorn" of traditional herbalism . The plant parts used are usually sprigs with both leaves and flowers, or alternatively the fruit ("berries"). Hawthorn has been investigated by evidence-based medicine for treating cardiac insufficiency. C. monogyna

5580-465: The miraculous winter-flowering Thorn is paired with an equally remarkable walnut tree that grew in the Abbey grounds and was said to flower on Midsummer's Day. Both were seen as marks of divine favour, proof that Glastonbury was 'the holyest erth of Englande'. The Thorn kept Glastonbury's legendary history alive during the centuries between the dissolution and the town's renaissance as a spiritual centre in

5673-515: The most solemn of forms available to the Church, the bull had no authority beyond the Catholic Church (of which he was the supreme religious authority) and the Papal States (which he personally ruled). The changes that he was proposing were changes to the civil calendar, which required adoption by the civil authorities in each country to have legal effect. The bull Inter gravissimas became

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5766-475: The new year was moved to 1 September. In common usage, 1 January was regarded as New Year's Day and celebrated as such, but from the 12th century until 1751 the legal year in England began on 25 March ( Lady Day ). So, for example, the Parliamentary record lists the execution of Charles I on 30 January as occurring in 1648 (as the year did not end until 24 March), although later histories adjust

5859-458: The next three centuries, the Protestant and Eastern Orthodox countries also gradually moved to what they called the " Improved calendar ", with Greece being the last European country to adopt the calendar (for civil use only) in 1923. However, many Orthodox churches continue to use the Julian calendar for religious rites and the dating of major feasts. To unambiguously specify a date during

5952-524: The norm, can be identified. In other countries, the customs varied, and the start of the year moved back and forth as fashion and influence from other countries dictated various customs. Neither the papal bull nor its attached canons explicitly fix such a date, though the latter states that the " Golden number " of 1752 ends in December and a new year (and new Golden number) begins in January 1753. During

6045-470: The number of leap years in four centuries from 100 to 97, by making three out of four centurial years common instead of leap years. He also produced an original and practical scheme for adjusting the epacts of the Moon when calculating the annual date of Easter, solving a long-standing obstacle to calendar reform. Ancient tables provided the Sun's mean longitude. The German mathematician Christopher Clavius ,

6138-451: The older Julian calendar for religious purposes. Extending the Gregorian calendar backwards to dates preceding its official introduction produces a proleptic calendar , which should be used with some caution. For ordinary purposes, the dates of events occurring prior to 15 October 1582 are generally shown as they appeared in the Julian calendar, with the year starting on 1 January, and no conversion to their Gregorian equivalents. For example,

6231-621: The order January to December from the Roman Republican period until the present. During the Middle Ages, under the influence of the Catholic Church, many Western European countries moved the start of the year to one of several important Christian festivals—25 December ( Christmas ), 25 March ( Annunciation ), or Easter, while the Byzantine Empire began its year on 1 September and Russia did so on 1 March until 1492 when

6324-492: The original exist, and these blossom twice a year, in May and at Christmas. The blossoms of the Christmas shoots are usually much smaller than the May ones and do not produce any haws . Plants grown from the haws do not retain the characteristics of the parent stem. The present "sacred thorn tree" at the Church of St John was grown from a local cutting, like many others in the neighbourhood of Glastonbury. The large tree had been in

6417-454: The period between 1582, when the first countries adopted the Gregorian calendar, and 1923, when the last European country adopted it, it was often necessary to indicate the date of some event in both the Julian calendar and in the Gregorian calendar, for example, "10/21 February 1750/51", where the dual year accounts for some countries already beginning their numbered year on 1 January while others were still using some other date. Even before 1582,

6510-515: The plaque beneath reads: "This hawthorn is probably the oldest tree in France. Its origin goes back to St Julien (third century)"; this has not yet been verified. A famous specimen in England was the Glastonbury or Holy Thorn which, according to legend, sprouted from the staff of Joseph of Arimathea after he thrust it into the ground while visiting Glastonbury in the first century AD. The tree

6603-512: The precision of observations towards the end of the 15th century made the question more pressing. Numerous publications over the following decades called for a calendar reform, among them two papers sent to the Vatican by the University of Salamanca in 1515 and 1578, but the project was not taken up again until the 1540s, and implemented only under Pope Gregory XIII (r. 1572–1585). In 1545,

6696-488: The reform also altered the lunar cycle used by the Church to calculate the date for Easter, because astronomical new moons were occurring four days before the calculated dates. Whilst the reform introduced minor changes, the calendar continued to be fundamentally based on the same geocentric theory as its predecessor. The reform was adopted initially by the Catholic countries of Europe and their overseas possessions. Over

6789-485: The reform commission for comments. Some of these experts, including Giambattista Benedetti and Giuseppe Moleto , believed Easter should be computed from the true motions of the Sun and Moon, rather than using a tabular method, but these recommendations were not adopted. The reform adopted was a modification of a proposal made by the Calabrian doctor Aloysius Lilius (or Lilio). Lilius's proposal included reducing

6882-410: The same basis, for years before 1582), and the difference between Gregorian and Julian calendar dates increases by three days every four centuries (all date ranges are inclusive). The following equation gives the number of days that the Gregorian calendar is ahead of the Julian calendar, called the "secular difference" between the two calendars. A negative difference means the Julian calendar is ahead of

6975-463: The same day, it took almost five centuries before virtually all Christians achieved that objective by adopting the rules of the Church of Alexandria (see Easter for the issues which arose). Because the date of Easter is a function – the computus  – of the date of the spring equinox in the northern hemisphere, the Catholic Church considered unacceptable

7068-415: The same purpose. Hawthorn was sometimes placed on the coffin of a deceased person, on top of the person's corpse, or in the corpse's sock. In Bosnia, women would sometimes place a piece of hawthorn behind the headcloth of a recently deceased person, and then throw away the remaining twig on their way home. If the deceased person was a vampire, it would focus its attention on the hawthorn instead of following

7161-525: The same to two sexagesimal places (0;14,33, equal to decimal 0.2425) and this is also the mean length of the Gregorian year. Thus Pitatus's solution would have commended itself to the astronomers. Lilius's proposals had two components. First, he proposed a correction to the length of the year. The mean tropical year is 365.24219 days long. A commonly used value in Lilius's time, from the Alfonsine tables,

7254-505: The start of the year to 1 January and record the execution as occurring in 1649. Most Western European countries changed the start of the year to 1 January before they adopted the Gregorian calendar. For example, Scotland changed the start of the Scottish New Year to 1 January in 1600 (this means that 1599 was a short year). England, Ireland and the British colonies changed the start of the year to 1 January in 1752 (so 1751

7347-431: The transition period (in contemporary documents or in history texts), both notations were given , tagged as 'Old Style' or 'New Style' as appropriate. During the 20th century, most non- Western countries also adopted the calendar, at least for civil purposes . The Gregorian calendar, like the Julian calendar , is a solar calendar with 12 months of 28–31 days each. The year in both calendars consists of 365 days, with

7440-579: The twentieth century. The abbey was dissolved in 1539 and substantially demolished during the reign of Elizabeth I, but the Thorn continued to flower at Christmas and many Catholics saw this as "a Testimony to Religion, that it might flourish in persecution". The Thorn's symbolic fortunes revived when the Stuart dynasty came to power in 1603. James I and Charles I took a much more relaxed view of Catholicism than Queen Elizabeth had done, and both were intrigued by its Christmas-flowering properties. James Montague , Bishop of Bath and Wells from 1608 to 1616, produced

7533-427: The vernal equinox falling on 10 or 11 March instead of the ecclesiastically fixed date of 21 March, and if unreformed it would have drifted further. Lilius proposed that the 10-day drift should be corrected by deleting the Julian leap day on each of its ten occurrences over a period of forty years, thereby providing for a gradual return of the equinox to 21 March. Lilius's work was expanded upon by Christopher Clavius in

7626-491: The woman home. Among the South Slavs , stakes made of hawthorn or blackthorn wood were considered effective in impaling vampires. An ancient specimen, and reputedly the oldest tree of any species in France, is to be found alongside the church at Saint Mars sur la Futaie , Mayenne . As of 2009, the tree had a height of 9 m (30 ft) and a girth of 2.65 m ( 8 + 1 ⁄ 2  ft). The inscription on

7719-612: The year (numbered according to a calendar era , in this case Anno Domini or Common Era ), the month (identified by name or number), and the day of the month (numbered sequentially starting from 1). Although the calendar year currently runs from 1 January to 31 December, at previous times year numbers were based on a different starting point within the calendar (see the "beginning of the year" section below). Calendar cycles repeat completely every 400 years, which equals 146,097 days. Of these 400 years, 303 are regular years of 365 days and 97 are leap years of 366 days. A mean calendar year

7812-432: The year sometimes had to be double-dated because of the different beginnings of the year in various countries. Woolley, writing in his biography of John Dee (1527–1608/9), notes that immediately after 1582 English letter writers "customarily" used "two dates" on their letters, one OS and one NS. "Old Style" (O.S.) and "New Style" (N.S.) indicate dating systems before and after a calendar change, respectively. Usually, this

7905-479: Was a short year with only 282 days). Later in 1752 in September the Gregorian calendar was introduced throughout Britain and the British colonies (see the section Adoption ). These two reforms were implemented by the Calendar (New Style) Act 1750 . In some countries, an official decree or law specified that the start of the year should be 1 January. For such countries, a specific date when a "1 January year" became

7998-642: Was at the time ruler over Spain and Portugal as well as much of Italy . In these territories, as well as in the Polish–Lithuanian Commonwealth and in the Papal States, the new calendar was implemented on the date specified by the bull, with Julian Thursday, 4 October 1582, being followed by Gregorian Friday, 15 October. The Spanish and Portuguese colonies followed somewhat later de facto because of delay in communication. The other major Catholic power of Western Europe, France, adopted

8091-457: Was celebrated when it was introduced by the early Church. The error in the Julian calendar (its assumption that there are exactly 365.25 days in a year) had led to the date of the equinox according to the calendar drifting from the observed reality, and thus an error had been introduced into the calculation of the date of Easter . Although a recommendation of the First Council of Nicaea in 325 specified that all Christians should celebrate Easter on

8184-404: Was extended to include use for general purposes and the number of the year became the same as in most other countries. This section always places the intercalary day on 29 February even though it was always obtained by doubling 24 February (the bissextum (twice sixth) or bissextile day) until the late Middle Ages . The Gregorian calendar is proleptic before 1582 (calculated backwards on

8277-466: Was marked with a lot of spring-like floral imagery, and it may be no coincidence that the most famous of the Thorn legends is first recorded in 1662. According to this, Joseph of Arimathea arrived on Wearyall Hill with his followers on Christmas Day; 'we are weary all', he announced, and planted his staff in the ground, which thereupon burst into flower. This story draws on a fairly common biblical theme in which saintly staves miraculously burst into flower as

8370-533: Was more than three days. Roger Bacon in c.  1200 estimated the error at seven or eight days. Dante , writing c.  1300 , was aware of the need for calendar reform. An attempt to go forward with such a reform was undertaken by Pope Sixtus IV , who in 1475 invited Regiomontanus to the Vatican for this purpose. However, the project was interrupted by the death of Regiomontanus shortly after his arrival in Rome. The increase of astronomical knowledge and

8463-514: Was noteworthy because it flowered twice in a year, once in the late spring which is normal, but also once after the harshness of midwinter had passed. The original tree at Glastonbury Abbey, felled in the 1640s during the English Civil War , has been propagated as the cultivar 'Biflora'. A replacement was planted by the local council in 1951, but was cut down by vandals in 2010. The oldest known living specimen in East Anglia , and possibly in

8556-404: Was printed by Vincenzo Accolti, one of the first calendars printed in Rome after the reform, notes at the bottom that it was signed with papal authorization and by Lilio ( Con licentia delli Superiori... et permissu Ant(onii) Lilij ). The papal brief was revoked on 20 September 1582, because Antonio Lilio proved unable to keep up with the demand for copies. Although Gregory's reform was enacted in

8649-412: Was to be corrected by one day every 300 or 400 years (8 times in 2500 years) along with corrections for the years that are no longer leap years (i.e. 1700, 1800, 1900, 2100, etc.) In fact, a new method for computing the date of Easter was introduced. The method proposed by Lilius was revised somewhat in the final reform. When the new calendar was put in use, the error accumulated in the 13 centuries since

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