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Gregorianb> calendar - Wikipedia, the free encyclopedia

The last day of the Julian calendar was 4 October 1582 and this was followed by the first day of the Gregorianb> calendar 15 October 1582.
The Gregorianb> Calendar was devised because the mean year in the Julian Calendar was slightly too long, causing the vernal equinox to slowly drift backwards in the calendar year.
Gregorianb> reform of the calendar: Proceedings of the Vatican conference to commemorate its 400th anniversary, 1582-1992, ed.

http://en.wikipedia.org/wiki/Gregorian_calendar (3894 words)



Astronomical Time Keeping

Although most sources date the conversion from Julian to Gregorianb> calendar for the pair of days October 4./15., 1582, this is in fact only true for countries where the Roman Catholic Church was influential.
Omission of 10 calendar days, the 4th of October 1582 was followed directly by the 15th of October 1582 in the new calendar.
At the beginning of the 16th century the date in the Julian calendar already lagged 10 days behind the true position of Earth in its orbit and the Easter date began to lose its intended connection with the Jewish feast of Passover (that is tied to the true start of spring).

http://www.maa.mhn.de/Scholar/calendar.html (3253 words)



Gregorianb> calendar -- Encyclopædia Britannica

Summarizes the astronomical bases and the history of calendars and then focuses on the Gregorianb>, Hebrew, Islamic, Indian, Chinese, and Julian calendars.
It was proclaimed in 1582 by Pope Gregory XIII as a reform of the Julian calendar.
A calendar is convenient for regulating civil life and religious observances and for historical and scientific purposes.

http://www.britannica.com/eb/article-9038013 (794 words)



cal.aspx

That means that the Gregorianb> calendar is slower than the mean tropical solar year by about 3 days in every 10,000 years.
The switch from Julian calendar to the Gregorianb> calendar in the English speaking world took place on Julian date Wednesday, September 3, 1752 when 11 days were removed making the new date Thursday, September 14, 1752.
U.S. government calendars are printed with the "Julian day" on them, which is the number of the day of the year.

http://www.abdicate.net/cal.aspx (2117 words)



The Gregorianb> Calendar

The only difference between the "Improved" and the Gregorianb> calendar was the determination of Easter but finally, in 1775, the Protestants threw over board their "astronomical" Easter calculation and, since 1776, celebrated Easter together with the Catholic church.
The days given are the last day of the Julian calendar and the first day of the Gregorianb> calendar.
There still is a slight difference between the Gregorianb> calendar and the exact length of the year, but this will amount to one day in more than 3,000 years.

http://www.ortelius.de/kalender/greg_en.php (596 words)



Tarek's Gregorianb> (Christian) /Hijri (Islamic)/ Julian / Hebrew (Jewish) / Chinese Universal Calendar Converter

The Soviet Union adopted the Gregorianb> calendar in 1918, and Greece adopted it in 1923 for civil purposes, but many countries affiliated with the Greek church retain the Julian, or Old Style, calendar for the celebration of church feasts.
The Islamic (Hijri) Calendar -with dates that fall within the Muslim Era- is usually abbreviated AH in Western languages from the Latinized Anno Hejirae "In the year of the Hijra." 1st of Muharram, AH 1 corresponds to Friday July 16th, 622 CE in the Julian Calendar.
The Islamic Calendar, which is based purely on lunar cycles, was first introduced in 638 CE by the close companion of the Prophet Muhammad and the second Caliph, `Umar ibn Al-Khattab (586-644 CE).

http://bennyhills.fortunecity.com/elfman/454/calindex.html (2515 words)



The Gregorianb> Calendar—History

The Gregorianb> calendar year differs from the solar year by only 26 seconds—accurate enough for most mortals, since this only adds up to one day's difference every 3,323 years.
The semilunar Hebrew calendar, consisting of twelve 29- and 30-day months, adds an intercalary month seven times every 19 years (which explains the sometimes confusing drift of Passover—and consequently Easter&; through April and March).
The Revolutionary calendar had no week; each month was divided into three decades, with every tenth day to be a day of rest.

http://www.factmonster.com/spot/gregorian1.html (914 words)



CATHOLIC ENCYCLOPEDIA: Reform of the Calendar

The first was attained by the omission from the calendar of the ten superfluous days, so as to bring things back to their proper position.
The necessity of a reform was continually urged, especially by Church authorities, who felt the need in connexion with the ecclesiastical calendar.
To obviate the recurrence of the same convenience, it was decided to omit three leap years in every four centuries, and thus eliminate the three superfluous days, which, as we have seen, would be introduced in that period under the Julian system.

http://www.newadvent.org/cathen/03168a.htm (928 words)



The Gregorianb> Conversion

The last Christian countries to accept the Gregorianb> calendar were the Orthodox ones.
Most countries had given up the improved calendar for the Gregorianb> easter by the end of the eighteenth century.
The Gregorianb> calendar was designed to restore the spring equinox to the March 21 date that had been traditional since the Council of Nicaea (see Alexandrian Easter).

http://www.polysyllabic.com/GregConv.html (1207 words)



Ecclesiastical Calendar: Enter a Year...

the Julian Calendar or the Gregorianb> Calendar, 1875-2124.
For example, England and its dominions did not accept the Gregorianb> Calendar or the new method of determining Easter until 1752; thus, Easter in England prior to 1753 was determined using the same algorithm as that of the Orthodox Church.
And some countries that switched to the Gregorianb> calendar used a different definition of Easter for some time (parts of Germany and Sweden used tables based on the observations of Tycho Brahe to determine Easter for many years after the Gregorianb> calendar was adopted in those locations).

http://www.smart.net/~mmontes/ec-cal.html (2614 words)



date conversions.htm

The Gregorianb> Calendar was not fully adopted in Great Britain until 1752, although it had been practically universal on the Continent for over a century.
Note: On the Gregorianb> proleptic calendar, the year 0 is counted as one.
In England and her colonies though the Gregorianb> Calendar was not legally adopted till 1752, its use had for years been common, at any rate in the American Colonies, so that great caution must be exercised in determining whether a particular date is O.S. or N.S. Mr.

http://www.dome-igm.com/convers.htm (1506 words)



Julian Date Converter

Adoption of the Gregorianb> calendar in the rest of the world progressed slowly.
This application assumes that the changeover from the Julian calendar to the Gregorianb> calendar occurred in October of 1582, according to the scheme instituted by Pope Gregory XIII.
Thus, there is a ten-day gap in calendar dates, but no discontinuity in Julian dates or days of the week: 4 October 1582 (Julian) is a Thursday, which begins at JD 2299159.5; and 15 October 1582 (Gregorianb>) is a Friday, which begins at JD 2299160.5.

http://aa.usno.navy.mil/data/docs/JulianDate.html (570 words)



Toke Nørby. The Perpetual Calendar

In the Gregorianb> Calendar there is then 303 years with 365 days and 97 years with 366 days, which gives a mean year of 365.24250 days: 365 days, 5 hours, 49 minutes and 12 seconds.
That means that in Slovenia and Croatia Gregorianb> calendar was in force at the moment they have joined with Serbia.
The Gregorianb> calendar was still in force in the southern Lithuania, the region called Uznemune or Suduva as it in 1795 was given to the German Prussia.

http://www.norbyhus.dk/calendar.html (8071 words)



*Ø* Wilson's Almanac free daily ezine History of Western Gregorianb> calendar Calendars Sisogenes intercalation Metonic reform Pope Gregory Babylonian Persian lunisolar equinox solstice pagan wheel year

The Gregorianb> Calendar, the one we use, however, is by far the most widespread.
The Jewish faith will continue with its calendar which dates from 3671 BC (the Creation), and the Islamic faith will have its calendar, dating from July 16, 622, the
lunisolar calendars, of which there are some left even today; for example, the Moslem, Jewish and Christian church calendars use both Selene (the moon goddess) and Sol (the sun god).

http://www.wilsonsalmanac.com/greg.html (3498 words)



Calendar a History - Timekeepers

January is the first month of the year in the Gregorianb> calendar with 31 days, and is named for the Roman god Janus, the god of gates, doors, openings and beginnings.
The Gregorianb> calendar established January 1 as the beginning of the year and has been referred to as the "new style calendar" and the Julian referred to as the "old style calendar".
In England, until the Gregorianb> calendar was adopted in 1752, March was considered the first month with the legal year beginning on March 25.

http://users.commspeed.net/k6xf/calendar.htm (4031 words)



Gregorianb> calendar - Wikipedia, the free encyclopedia

The last day of the Julian calendar was 4 October 1582 and this was followed by the first day of the Gregorianb> calendar 15 October 1582.
The Gregorianb> calendar was devised because the mean year in the Julian Calendar was a little too long, causing the vernal equinox to slowly drift backwards in the calendar year.
The Gregorianb> calendar is the calendar that is used nowadays nearly everywhere in the world.

http://en.wikipedia.org/wiki/Gregorian_calendar (3677 words)



Old Style and New Style Dates

The Swedes finally settled for the Gregorianb> calendar in 1753 omitting the eleven days from 18th to the end of February of that year.
"Not until 1753 was Sweden ready for the adoption of the Gregorianb> calendar.
China started to use the Gregorianb> calendar for official and business purposes in 1912, but the traditional Chinese lunar calendar continues to be used for most personal matters, such as the celebration of birthdays and festivals, for agricultural purposes in many rural areas, and for deciding when to celebrate the Chinese New Year.

http://www.genfair.com/dates.htm (2521 words)



2. The Christian Calendar

This is case even in the churches that otherwise use the Gregorianb> calendar.
When the Greek Orthodox Church in 1923 decided to change to the Gregorianb> calendar (or rather: a Revised Julian Calendar), they chose to use the astronomical full moon as the basis for calculating Easter, rather than the ``official'' full moon described in the previous sections.
The Gregorianb> calendar replaced the Chinese calendar in 1912, but the Gregorianb> calendar was not used throughout the country until the communist revolution of 1949.

http://www.tondering.dk/claus/cal/node3.html (7749 words)



Gregorianb> Calendar

The Gregorianb> Calendar was introduced as the correction to the previously universal Julian calendar.
The obvious advantages of the Gregorianb> calendar were not accepted everywhere because of the breakdown between Eastern and Western Christianity and of Protestants and Roman Catholics.
Without doubt, Easter was the most important feast of the Christian Church, and its place in the calendar determined the position of the rest of the church's movable feasts[5].

http://www.math.sfu.ca/histmath/calendars/gregorian.html (883 words)



Astronomical Time Keeping

Although most sources date the conversion from Julian to Gregorianb> calendar for the pair of days October 4./15., 1582, this is in fact only true for countries where the Roman Catholic Church was influential.
Omission of 10 calendar days, the 4th of October 1582 was followed directly by the 15th of October 1582 in the new calendar.
At the beginning of the 16th century the date in the Julian calendar already lagged 10 days behind the true position of Earth in its orbit and the Easter date began to lose its intended connection with the Jewish feast of Passover (that is tied to the true start of spring).

http://www.maa.mhn.de/Scholar/calendar.html (3253 words)



JavaScript Gregorianb> Calendar

However, the Gregorianb> calendar was initially adopted only in Catholic European countries.
Here is a readable brief history of the development of the Gregorianb> calendar.
in 1582, as a correction to the widely followed Julian calendar, when it became apparent that Easter was in grave danger of turning into a Summer festival.

http://www.chaoszone.org/misc/gregorian.html (527 words)



2. The Christian Calendar

This is case even in the churches that otherwise use the Gregorianb> calendar.
When the Greek Orthodox Church in 1923 decided to change to the Gregorianb> calendar (or rather: a Revised Julian Calendar), they chose to use the astronomical full moon as the basis for calculating Easter, rather than the ``official'' full moon described in the previous sections.
The Gregorianb> calendar replaced the Chinese calendar in 1912, but the Gregorianb> calendar was not used throughout the country until the communist revolution of 1949.

http://www.tondering.dk/claus/cal/node3.html (7647 words)



Define Gregorianb> calendar - a Whatis.com definition

The Gregorianb> calendar is the calendar in current use in the Western world, both as the civil and Christian ecclesiastical calendar.
The Gregorianb> calendar replaced the Julian calendar, which had become 10 days out of synchrony with the solar cycle.
Instituted by Pope Gregory XIII in 1582, the calendar has 365 days with an extra day every four years (the leap year) except in years divisible by 100 but not divisible by 400.

http://whatis.techtarget.com/definition/0,,sid9_gci212214,00.html (201 words)



Gregorianb> calendar

Such a change would make the Gregorianb> calendar correct to one day in 20,000 years.
The Gregorianb> calendar is a version of the Julian calendar, altered a bit to reduce an intolerable difference between lengths of the solar year and the Julian calendar year.
The principal creator of the Gregorianb> calendar was Luigi Giglio (Latinized as Aloysius Lilius, ?-1576), a lecturer in medicine at the University of Perugia.

http://www.sizes.com/time/cal_gregorian.htm (597 words)



The British Switch to the Gregorianb> Calendar

The Gregorianb> calendar was adopted by most Roman Catholic countries.
To convert from the old Julian to the new Gregorianb> calendar, one must add 10 to 13 days to the old date, and sometimes change the year one extra when the date considered falls within the period January 1 -- March 24.
The British finally accepted the Gregorianb> calendar for itself and all its possessions effective March 25, 1752.

http://www.crowl.org/Lawrence/time/britgreg.html (584 words)



Proleptic Gregorianb> calendar - Wikipedia, the free encyclopedia

Note that the Julian calendar was in actual use after AD 4, until 1582 or later (see From Julian to Gregorianb> in Julian calendar), so historians and astronomers prefer to use the actual Julian calendar during that period.
But when seasonal dates are important, the proleptic Gregorianb> calendar is sometimes used, especially when discussing cultures that did not use the Julian calendar.
The proleptic Gregorianb> calendar is produced by extending the Gregorianb> calendar to dates preceding its official introduction in 1582.

http://en.wikipedia.org/wiki/Proleptic_Gregorian_Calendar (234 words)



Calendar

The year 2006 is a normal year, with 365 days in total (Gregorianb> calendar)
Add a number of days to a given date
List of years that use the same calendar as 2006

http://www.timeanddate.com/calendar (232 words)



ASPN : Python Cookbook : proleptic Gregorianb> dates and strftime before 1900

But only if you're using the Gregorianb> # calendar.
Of course no one used these dates before the creation of the Gregorianb> calendar so the date Jan. 13, 1054 makes sense only by extending the calendar backwards.
Fixing the %Y is done by finding another date with the same calendar (shift by 28 years).

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/306860 (431 words)



The Gregorianb> Calendar

The Gregorianb> Calendar is a revision of the Julian Calendar which was instituted in a papal bull by Pope Gregory XIII in 1582.
The reason for the calendar change was to correct for drift in the dates of signifigant religious observations (primarily Easter) and to prevent further drift in the dates.
The additional day came because the old and new calendars disagreed on whether 1700 was a leap year, so the Julian calendar had to be adjusted by one more day.

http://www.furrfu.com/magpies/cal_gregorian.html (236 words)



Converting Between Julian Dates and Gregorianb> Calendar Dates

Conversion from a Gregorianb> calendar date to a Julian date.
Conversion from a Julian date to a Gregorianb> calendar date.
Converting Between Julian Dates and Gregorianb> Calendar Dates

http://aa.usno.navy.mil/faq/docs/JD_Formula.html (364 words)

Topic: Gregorian <b>calendar<

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