Gregorian Calendar - Gregorian Calendar The Gregorian Calendar, a modification of the Julian calendar, was first proposed by Neapolitan doctor Aloysius Lilius, and adopted by Pope Gregory XIII on February 24, 1582 (the document was dated 1581 on account of the pope starting the year in March). The mean year in the Julian Calendar had exactly 365.25 days, but the mean tropical year duration is approximately 365.2422. As a result, every thousand years the calendar adds about 8 extraneous days, causing it to fall behind the solar year. Accuracy The Gregorian Calendar improves the approximation by skipping 3 Julian leap days in every 400 years, giving an average year of 365.2425 mean solar dayss long, which has an error of about 1 day per 3000 years with respect to.
Julian calendar - Julian calendar The Julian calendar was introduced by Julius Caesar in 46 BC, taking force in 45 BC or 709 ab urbe condita. It was chosen after consultation with Sosigenes and was obviously designed to approximate the tropical year as it was known at the time. It has a regular year of 365 days divided into 12 months, and a leap day is added every 4 years. The calendar remained in use into the 20th century in some places. However with this scheme too many leap days are added with respect to the astronomical seasons, which on average occur earlier in the calendar by about 11min per year. It is said that Caesar was aware of the discrepancy, but felt it was of little importance. In the.
Iranian calendar - Iranian calendar Persians have always been keen on the idea and importance of calendar system for as long as their documented history has been recorded. They are among the first cultures to use solar calendar systems and have always favoured the solar calendar. In general, the sun has always, even to this day, had a special meaning and great symbolic significance in the Iranian culture. Today Iran uses a solar calendar with a leap day system which is older but more scientifically accurate than the Gregorian calendar. The present Iranian calendar's leap day system was devised in the 11th century by a panel of scientists including Omar Khayyam, who was one of the foremost leading mathematicians and astronomers of his time, but today is well-known in the.
Islamic calendar - Islamic calendar The Islamic calendar is a purely lunar one. In A.D. 638, the second Caliph Umar ibn al-Khattab (A.D. 592-644) introduced the calendar as a way of consolidating the various calendars then in common usage among Muslim peoples. The years are measured from the first of Muharram of the year in which Muhammad emigrated to the city of Medina, which corresponds to July 16, A.D. 622 (the actual emigration took place in September). The calendar is also called the Hijri Calendar as this migration is called the Hegira. The first day of the first month (1 MuHarram) of the first year (1 AH) is this day. Dates in this calendar are usually abbreviated using AH from the latinized phrase Anno Hegirae, "in the year of the.
Hebrew calendar - Hebrew calendar The Hebrew calendar is the annual calendar used in Judaism. It is based upon both the lunar cycle (which defines months) and the solar cycle (which defines years). This is in contrast to the Gregorian calendar, which is based solely upon the solar cycle. Jews use this calendar to determine when the new Hebrew months start; this calendar determines the Jewish holidays, which Torah portions to read, and which set of Psalms should be read each day. Jews have been using the lunar calendar since Biblical times, but usually referred to months by number rather than name. During the Babylonian exile, they adopted Babylonian names for months and possibly a regular pattern of intercalating the 13th month. Some sects, such as the Essenes, used a.
Hindu calendar - Hindu calendar There are many variations of Hindu calendars (also called Indian calendars). Some regions use a solar calendar based on what are the signs of the Zodiac in English. Other regions use a luni-solar calendar with months based on the lunar cycle and years of either 12 or 13 months. The Gregorian calendar is also widely used in India for civil purposes. Many Hindus use both a lunar and a solar calendar simultaneously, as part of a panchangam. The word means "five limbs". The five parts of a panchangam depend on: 1. the lunar day, 2. the lunar month, 3. the half-day, 4. the angle of the sun and moon, and 5. the solar day. Some lunar calendars start each month with a new moon, while.
How to compute calendars - or founding date and then count the days from that date. Labels are then assigned at the periodic cycles established by the calendar. All calendars work in this fashion. The standard Western calendar (Gregorian) began on October 15, 1582 which was a Saturday. January, March, May, July, August, October and December have 31 days. Except for February, the other months have 30 days. When a year is divisible by 400, has 29 days, when divisble by 100 (but not 400), 28 days, when divisble by 4 (but not 100) 29 days, and otherwise, 28 days. The Gregorian calendar was adopted by different areas at different times. Before that, there was the Julian Calendar. In general, the Julian calendar has the same calculation, except that it begins January 1, year 1 which.
Gregorian - Gregorian For information on the calendar, see: Gregorian Calendar. For the music style, see: Gregorian chant. This is a disambiguation page; that is, one that just points to other pages that might otherwise have the same name. If you followed a link here, you might want to go back and fix that link to point to the appropriate specific page..
Greek Old Calendarists - Church of Greece or from the Patriarchate of Constantinople, precipitated by disagreement over the retention of the Julian Calendar. History Up to the early 20th century, the Eastern Orthodox Church used the Julian Calendar universally, not accepting the calendric reforms of the Roman Pope Gregory XIII. Traditionally Orthodox Christian countries, including Russia, Greece, and Romania did not use the Gregorian Calendar for civil and governmental affairs up through the first decade of the 20th century. The Gregorian calendar was imposed in Russia in 1918 by a decree of the Council of People's Commissar's, but only on civil affairs. Greece did not adopt a civil Gregorian calendar until 1923. In 1924, the Synod of the Orthodox Church of Greece voted to accept an altered form of the Gregorian calendar that maintained the.
French Revolutionary Calendar - French Revolutionary Calendar The French Revolutionary Calendar is a calendar proposed during the French Revolution, and in use by the French government for 13 years from 1793. It was abolished by Napoléon partly to appease the Catholic Church, which opposed the calendar because it abolished the Sabbath, but mainly because he had crowned himself Emperor of the French in December 1804 and had created the new Empire's Nobility during the year 1805. These were both concepts that were incompatible with the fundamental tenets of this calendar. It was designed by mathematician Gilbert Romme, although is usually attributed to Fabre d'Églantine, who invented the names of the months and the days. The calendar was adopted by the Jacobin-controlled National Convention on October 24, 1793. Years appear in writing as.
Vernal equinox - celestial equator, heading northward. The equinox occurs around March 20-22, varying slightly each year according to the 400 year cycle of leap years in the Gregorian Calendar. At the present time, the vernal equinox occurs as the sun moves through the constellation Pisces. 2000 years ago the equinox was in Aries and by 2600 it will be in Aquarius. In the southern hemisphere, the equinox occurs at the same moment, but at the beginning of autumn. There are two conventions for dealing with this: either the name of the equinox can be changed to the autumnal equinox, or (apparently more commonly) the name is unchanged and it is accepted that it is out of sync with the season. The alternative terms March equinox or northward equinox avoid any such ambiguity. At.
J. Eric S. Thompson - ethnology on the side, and writing books for both technical and lay audiences. Thompson conducted a number of excavations at sites in British Honduras. He was one of the first in the field to investigate and excavate smaller sites and areas away from the elite ceremonial centers, to learn more about the lives of common Maya people. Expanding on the earlier work of John T. Goodman and Juan H. Martinez-Hernandez, (largely neglected by other scholars at the time), Thompson developed the correlation between the Maya calendar and the Gregorian calendar that became generally accepted. J. Eric S. Thompson did considerable work with the decypherment of Maya hieroglyphics, especially those related to the calendar and astronomy, as well as identifying some new nouns. He developed a numerical cataloguing system for the glyphs,.
January - January is the first month of the year in the Gregorian Calendar, and has 31 days. It is named for Janus, the Roman god of doors and gateways. January and February were the last two months to be added to the calendar, since the Romans originally considered winter a monthless period. Although March was originally the first month, January usurped that position because that was when consuls were usually chosen. The first day of the month is known as New Year's Day. The coming of age day in Japan since 1948 is a national holiday on which the nation celebrates those who turn 20 years of age. The day used to be January 15 until the year 1999. The day was moved by the Japanese government in an attempt to lift.
January 1 - January 1 January 1 is the 1st day of the year in the Gregorian Calendar. There are 364 days remaining (365 in leap years). Table of contents showTocToggle("show","hide") 1 Events 2 Births 3 Deaths 4 Holidays and observances Events 153 BC - New Year's Day first celebrated 45 BC - Julian calendar goes into effect 404 - Last gladiator competition in Rome 1438 - Albert II of Habsburg becomes King of Hungary 1502 - Rio de Janeiro discovered 1622 - In the Gregorian calendar, January 1 is declared as the first day of the year, instead of for example March 25 in England 1651 - Charles II crowned King of Scotland 1700 - Russia accepts Julian calendar 1707 - John V becomes King of Portugal 1738 - Bouvet Island was discovered.
January 2 - January 2 January 2 is the 2nd day of the year in the Gregorian Calendar. There are 363 days remaining (364 in leap years). Table of contents showTocToggle("show","hide") 1 Events 2 Births 3 Deaths 4 Holidays and observances Events 366 - Alamanni cross frozen Rhine in large numbers, invading Roman Empire. 1492 - Reconquista: Granada, the last Moorish stronghold in Spain, surrenders. 1757 - The United Kingdom captures Calcutta, India 1788 - Georgia becomes the 4th state to ratify the United States Constitution. 1815 - Lord Byron marries Anna Isabella Milbanke, Seaham, County Durham 1818 - British Institution of Civil Engineers formed 1859 - Erastus Beadle publishes The Dime Book of Practical Etiquette. 1870 - Construction of the Brooklyn Bridge begins 1871 - Amadeus I becomes King of Spain 1872 -.
January 3 - January 3 January 3 is the 3rd day of the year in the Gregorian Calendar. There are 362 days remaining (363 in leap years). Table of contents showTocToggle("show","hide") 1 Events 2 Births 3 Deaths 4 Holidays and observances Events 1496 - Leonardo da Vinci unsuccessfully tests a flying machine 1521 - Pope Leo X excommunicates Martin Luther. 1777 - Battle of Princeton. American general George Washington defeats British general Charles Cornwallis. 1815 - Austria, Britain, and France form a secret defensive alliance treaty against Prussia and Russia. 1823 - Stephen F. Austin receives a grant of land in Texas from the government of Mexico 1833 - Britain seizes control of the Falkland Islands in the South Atlantic. 1834 - The government of Mexico imprisons Stephen F. Austin in Mexico City 1840.
January 15 - January 15 is the 15th day of the year in the Gregorian Calendar. There are 350 days remaining (351 in leap years). Table of contents showTocToggle("show","hide") 1 Events 2 Births 3 Deaths 4 Holidays and observances Events 1559 - Elizabeth I of England is crowned in Westminster Abbey. 1582 - Russia cedes Livonia and Estonia to Poland. 1759 - The British Museum opens. 1777 - American Revolutionary War: New Connecticut (present day Vermont) declares its independence. 1782 - Superintendent of Finance Robert Morris goes before the United States Congress to recommend establishment of a national mint and decimal coinage. 1844 - University of Notre Dame receives its charter from Indiana. 1870 - A political cartoon for the first time symbolizes the United States Democratic Party with a donkey ("A Live Jackass.
January 26 - January 26 is the 26th day of the year in the Gregorian Calendar. There are 339 days remaining (340 in leap years). Table of contents showTocToggle("show","hide") 1 Events 2 Births 3 Deaths 4 Holidays and observances Events 1340 - King Edward III of England is declared King of France. 1500 - Vicente Yáńez Pinzón become the first European to discover Brazil. 1531 - Lisbon, Portugal is hit by an earthquake-- thousands die. 1699 - Treaty of Carlowitz signed. 1736 - Stanislaus I of Poland abdicates his throne. 1788 - The British First Fleet, led by Arthur Phillip, land at Botany Bay just outside present-day Sydney. They would establish the first permanent European settlement on the continent. Celebrated as Australia Day, the country's national day. 1837 - Michigan is admitted as the.
January 28 - January 28 is the 28th day of the year in the Gregorian Calendar. There are 337 days remaining (338 in leap years). Table of contents showTocToggle("show","hide") 1 Events 2 Births 3 Deaths 4 Holidays and observances Events 1521 - Diet of Worms begins, lasting until May 25. 1547 - Edward VI becomes King of England. 1573 - articles of Warsaw Confederation are signed, sanctioning religious freedom in Poland 1788 - The first penal colony is founded at Botany Bay, Australia. 1855 - first locomotive runs from the Atlantic to the Pacific on the Panama Railway 1871 - France surrenders to end the Franco-Prussian War. 1878 - The Yale News becomes the first daily, college newspaper in the United States. 1902 - The Carnegie Institution is founded in Washington, DC with a.
January 31 - January 31 is the 31st day of the year in the Gregorian Calendar. There are 334 days remaining, (335 in leap years). Table of contents showTocToggle("show","hide") 1 Events 2 Births 3 Deaths 4 Holidays and observances Events 1504 - France cedes Naples to Aragon. 1606 - Gunpowder Plot: Guy Fawkes is executed for his plotting against Parliament and James I of England. 1747 - The first venereal diseases clinic opens at London Dock Hospital. 1849 - Corn Laws abolished in the United Kingdom. 1865 - American Civil War: Confederate General Robert E. Lee becomes general-in-chief. 1876 - The United States orders all Native Americans to move into reservations. 1814 - Gervasio Antonio de Posadas becomes Supreme Director of Argentina. 1915 - World War I: Germany uses poison gas against Russians. 1917.
