The Gregorian Reforms were a series of reforms initiated by Pope Gregory VII and the circle he formed in the papal curia, c. 1050–80, which dealt with...

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...

was the drift of 21 March from the observed equinox that led to the Gregorian reform of the calendar, to bring them back into line. The earliest known Roman...

"The Civil Reception of the Gregorian Calendar". In Coyne, G. V.; Hoskin, M. A.; O., Pedersen (eds.). The Gregorian Reform of the Calendar: Proceedings...

Library as Lat. 3806 Things named for Pope Gregory VII: The Gregorian Reform, a series of reforms initiated by Pope Gregory VII and the circle he formed in...

corrected by the Gregorian reform of 1582. The Gregorian calendar has the same months and month lengths as the Julian calendar, but, in the Gregorian calendar...

Gregorian change in the solar calendar, if they were applied at 1 January of the Julian calendar instead of the Gregorian calendar as the reformers implemented...

45.1 (1970): 1–35. Cowdrey, H. E. J. (1970). The Cluniacs and the Gregorian Reform. Evans, Joan (1968). Monastic Life at Cluny 910–1157. Oxford: Oxford...

by almost six hours. However, this correction is excessive and the Gregorian reform modified the Julian calendar's scheme of leap years as follows: Every...

introduced with the Synod of Ráth Breasail in 1111 and culminating with the Gregorian Reform which coincided with the Anglo-Norman invasion of Ireland. After the...

The adoption of the Gregorian Calendar has taken place in the history of most cultures and societies around the world, marking a change from one of various...

the 116th day of the year, but this has never occurred since the Gregorian reforms were implemented. The first time Easter will occur on April 25 in...

the Lateran Gregorian Reform The Investiture Controversy Barrow, Julia (2009). "Ideology of the Tenth-Century English Benedictine 'Reform'". In Skinner...

reinforcing imperial authority over the Church. In response to this, the Gregorian Reform commenced in the mid-11th century. By 1059, Pope Nicholas II had transferred...

a saint in the Catholic Church. One of the great reforming popes, he initiated the Gregorian Reform, and is perhaps best known for the part he played...

challenges, the church fought heresy and established courts of inquisition. Gregorian reform led to a more centralized and bureaucratic Catholicism. Artistic and...

religious reform, and a source of taxes. At the time, Irish marriage laws conflicted with those of the broader Church, and the Gregorian Reform had not...

VI (1045–1046) Pope Gregory VII (saint; 1073–1085), after whom the Gregorian Reform is named Antipope Gregory VIII (1118–1121) Pope Gregory VIII (1187)...

needed] Civil law (common law) Concordat of Worms Corruption in religion Gregorian Reform Indulgence, a Church doctrine widely abused in the late medieval period...

1057. As pope, Stephen retained the Montecassino abbacy, enforced the Gregorian Reform, and continued Leo IX's efforts to expel Normans from southern Italy...

Gregorian chant is the central tradition of Western plainchant, a form of monophonic, unaccompanied sacred song in Latin (and occasionally Greek) of the...

Cotsworth calendar, the Eastman plan or the Yearal) was a proposed reform of the Gregorian calendar designed by Moses B. Cotsworth, first presented in 1902...

he would accept the position, which amounted to the agenda of the Gregorian Reform: the king would have to return the Catholic Church lands which had...

1057. Victor II was one of a series of German-born popes who led the Gregorian Reform. Gebhard was a native of the Kingdom of Germany in the Holy Roman Empire...

to be known as the Gregorian calendar and has been almost universally adopted. Much of the populace bitterly opposed this reform; they feared it was...

Vartan Gregorian (April 8, 1934 – April 15, 2021) was an Armenian-American academic, educator, and historian. He served as president of the Carnegie Corporation...

June is the sixth and current month of the year in the Julian and Gregorian calendars—the latter the most widely used calendar in the world. Its length...

a "rhetoric of reform". Medieval examples include the Cluniac Reform in the 10th–11th centuries, and the 11th-century Gregorian Reform, both striving...

the proposal that (after modifications) became the basis of the Gregorian Calendar reform of 1582. The crater Lilius on the Moon is named after him, as...

foundation of burghs and regional markets, implementation of the ideals of Gregorian Reform, foundation of monasteries, Normanisation of the Scottish government...