The Julian calendar is a solar calendar of 365 days in every year with an additional leap day every fourth year. The Julian calendar is still used as a religious calendar in parts of the Eastern Orthodox Church and in parts of Oriental Orthodoxy as well as by the Amazigh people.
The Revised Julian calendar, or less formally the new calendar and also known as the Milanković calendar, is a calendar proposed in 1923 by the Serbian scientist Milutin Milanković as a more accurate alternative to both Julian and Gregorian calendars. At the time, the Julian calendar was still in use by all of the Eastern Orthodox Churches and affiliated nations, while the Catholic and Protestant nations were using the Gregorian calendar. Thus, Milanković's aim was to discontinue the divergence between the naming of dates in Eastern and Western churches and nations. It was intended to replace the Julian calendar in Eastern Orthodox Churches and nations. From 1 March 1600 through 28 February 2800, the Revised Julian calendar aligns its dates with the Gregorian calendar, which had been proclaimed in 1582 by Pope Gregory XIII.
The Coptic calendar, also called the Alexandrian calendar, is a liturgical calendar used by the Coptic Orthodox Church and also used by the farming populace in Egypt. It was used for fiscal purposes in Egypt until the adoption of the Gregorian calendar on 11 September 1875. This calendar is based on the ancient Egyptian calendar. To avoid the calendar creep of the latter, a reform of the ancient Egyptian calendar was introduced at the time of Ptolemy III which consisted of adding an extra day every fourth year. However, this reform was opposed by the Egyptian priests, and the reform was not adopted until 25 BC, when the Roman Emperor Augustus imposed the Decree upon Egypt as its official calendar. To distinguish it from the Ancient Egyptian calendar, which remained in use by some astronomers until medieval times, this reformed calendar is known as the Coptic or Alexandrian calendar. Its years and months coincide with those of the Ethiopian calendar but have different numbers and names.
Julius Wellhausen was a German biblical scholar and orientalist. In the course of his career, his research interest moved from Old Testament research through Islamic studies to New Testament scholarship. Wellhausen contributed to the composition history of the Pentateuch/Torah and studied the formative period of Islam. For the former, he is credited as one of the originators of the documentary hypothesis.
The Ussher chronology is a 17th-century chronology of the history of the world formulated from a literal reading of the Old Testament by James Ussher, the Archbishop of Armagh and Primate of All Ireland. The chronology is sometimes associated with young Earth creationism, which holds that the universe was created only a few millennia ago by God as described in the first two chapters of the biblical book of Genesis. Ussher's work fell into disrepute in the 19th century.
An ecclesiastical new moon is the first day of a lunar month in an ecclesiastical lunar calendar. Such months have a whole number of days, 29 or 30, whereas true synodic months can vary from about 29.27 to 29.83 days in length. Medieval authors equated the ecclesiastical new moon with a new crescent moon, but it is not a phase of the true moon. If the ecclesiastical lunar calendar is accurate, the ecclesiastical new moon can be any day from the day of the astronomical new moon or dark moon to two days later. The ecclesiastical calendar valid for the Julian and Gregorian calendar are described in detail by Grotefend, Ginzel and in the Explanatory Supplement to The Astronomical Ephemeris.
Ages in Chaos is a book by the controversial writer Immanuel Velikovsky, first published by Doubleday in 1952, which put forward a major revision of the history of the Ancient Near East, claiming that the histories of Ancient Egypt and the Israelites are five centuries out of step. He followed this with a number of other works where he attempted to complete his reconstruction of ancient history, collectively known as the Ages in Chaos series.
Anno Mundi, abbreviated as AM or A.M., or Year After Creation, is a calendar era based on the biblical accounts of the creation of the world and subsequent history. Two such calendar eras have seen notable use historically:
Chronicon Paschale, also called Chronicum Alexandrinum, Constantinopolitanum or Fasti Siculi, is the conventional name of a 7th-century Greek Christian chronicle of the world. Its name comes from its system of chronology based on the Christian paschal cycle; its Greek author named it Epitome of the ages from Adam the first man to the 17th year of the reign of the most August Heraclius.
Uwe Topper is a German amateur researcher and author of books about historic, ethnographic, and anthropological subjects.
Gunnar Heinsohn was a German author, sociologist and economist and professor emeritus at the University of Bremen where he had a chair in social pedagogy from 1984.
Johannes Fried is a German historian, professor, and medievalist.
The Sardica paschal table or Sardica document is a document from a Latin manuscript of the 7th/8th century AD. It is a copy in Latin translation of the creed of the Eastern Christian bishops attending the Council of Sardica who, fearing that their deliberations would be dominated by Western bishops, met separately at Philippopolis. Appended to the creed and anathemas is a table of Paschal full moon dates, given as dates in the Julian calendar, for the years 328 to 357, together with a list of dates of 14 Nisan in the Jewish calendar, also referred to the Julian calendar, for the years 328 to 343, the year of the Council. The calendrical information contained in the document has been used by scholars in tracing the history of the computus and of the Hebrew calendar.
The Gregorian calendar is the calendar used in most parts of the world. It went into effect in October 1582 following 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 the Sun.
Alwin Schultz was a German art historian and medievalist, professor of art history at the Charles University in Prague.
Weilheim in Oberbayern is a town in Germany, the capital of the district Weilheim-Schongau in the south of Bavaria. Weilheim has an old city-wall, historic houses and a museum.
The date of the birth of Jesus is not stated in the gospels or in any historical sources and the evidence is too incomplete to allow for consistent dating. However, most biblical scholars and ancient historians believe that his birth date is around 4 to 6 BC. Two main approaches have been used to estimate the year of the birth of Jesus: one based on the accounts in the Gospels of his birth with reference to King Herod's reign, and the other by subtracting his stated age of "about 30 years" when he began preaching.
Heinrich Rückert was a German historian and Germanist. He was the son of orientalist and poet Friedrich Rückert (1788–1866).
The Bosporan era, also called the Bithynian era, Pontic era or Bithyno-Pontic era, was a calendar era used from 149 BC at the latest until at least AD 497 in Asia Minor and the Black Sea region. It originated in the Bithynian Kingdom and was also used in the Pontic Kingdom and, for the longest time, in the Bosporan Kingdom. The calendar era begins with the assumption of the royal title by Zipoetes I of Bithynia in October 297 BC, which marks the start of its year one. The Bosporan year began at the autumnal equinox.
Barbara Vogel is a German historian.
