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Dionysius did not use the AUC convention, but instead based his calculations on the Diocletian era. This convention had been in use since AD 293, the year of the tetrarchy, as it became impractical to use regnal years of the current emperor. [9] In his Easter table, the year AD 532 (AUC 1285) was equated with the 248th regnal year of Diocletian.
Years affected are those which divide by 100 without remainder but do not divide by 400 without remainder (e.g., 1900 and 2100 but not 2000). No guidance is provided about conversion of dates before March 5, -500, or after February 29, 2100 (both being Julian dates).
The year used in dates during the Roman Republic and the Roman Empire was the consular year, which began on the day when consuls first entered office—probably 1 May before 222 BC, 15 March from 222 BC and 1 January from 153 BC. [44]
These Pythagorean-based changes to the Roman calendar were generally credited by the Romans to Numa Pompilius, [4] Romulus's successor and the second of Rome's seven kings, as were the two new months of the calendar. [37] [38] [c] Most sources thought he had established intercalation with the rest of his calendar.
For computational reasons, astronomical year numbering and the ISO 8601 standard designate years so that AD 1 = year 1, 1 BC = year 0, 2 BC = year −1, etc. [c] In common usage, ancient dates are expressed in the Julian calendar, but ISO 8601 uses the Gregorian calendar and astronomers may use a variety of time scales depending on the ...
This template calculates the birth year and current age based on the age as of several dates. Template parameters [Edit template data] This template prefers inline formatting of parameters. Parameter Description Type Status Age 1 Age of subject at date of reference's publication. Example 55 Number required Year 2 Year of publication of reference. Example 1950 Number required Month 3 Month of ...
'Roman year since the creation of the universe', abbreviated as ε.Κ.), was the calendar used by the Eastern Orthodox Church from c. 691 to 1728 in the Ecumenical Patriarchate. [2] [note 2] It was also the official calendar of the Byzantine Empire from 988 to 1453 and it was used in Russia until 1700.
{{Birth date and age}} – used on most biographical entries {{Birth date and age2}} – calculates age at a specified date {{Birth based on age as of date}} – used when a reference mentions the age of a person as of the date of the reference's publication {{Birth year and age}} {} {{Death date and age}} {{Death year and age}}