The Gregorian Reforms were a series of reforms initiated by Pope Gregory VII and the circle he formed in the papal curia, c. 1050–1080, 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...

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...

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

Gregorian date equals the Julian date plus 13 days. The Julian calendar was proposed in 46 BC by (and takes its name from) Julius Caesar, as a reform...

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...

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...

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...

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...

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

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...

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...

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...

western military aid against the Turks, resulting in the Crusades. Gregorian reform led to a more centralized and bureaucratic Catholicism. Faced with...

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

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

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...

Bishop of Grenoble from 1080 to his death. He was a partisan of the Gregorian reform and opposed to the Archbishop of Vienne, later Pope Callixtus II. Born...

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

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)...

included his foundation of burghs, implementation of the ideals of Gregorian Reform, foundation of monasteries, Normanisation of the Scottish government...

parish priest. Married priests were not entirely uncommon prior to the Gregorian reform. He probably succeeded his father as priest to the parish. Seeking...

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

until his death, c.1082. Cunibert had an ambiguous relationship with Gregorian reform. In April 1059, Cunibert attended the Lateran council held by Pope...

Lordship of Ireland. The Hiberno-Normans were associated with the Gregorian Reform of the Catholic Church in Ireland and contributed to the emergence...

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...

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...

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...

principles of the Gregorian reform, both in regard to the discipline of clergy as religious and moral life of the laity. He participated in the reform councils...