Lịch Gregorius
Chú thích

↑  The Julian calendar assumed incorrectly that the average year is exactly 365.25 days long.
↑  Since the First Council of Nicaea and first Easter of AD 325, instead of 45 BC when Julian calendar was adopted.
↑  Two era names occur within the bull Inter gravissimas itself, anno Incarnationis dominicæ ("in the year of the Incarnation of the Lord") for the year it was signed and anno à Nativitate Domini nostri Jesu Christi ("in the year from the Nativity of our Lord Jesus Christ") for the year it was printed.'"`UNIQ--ref-00000008-QINU`"'
↑  The cycle described applies to the solar, or civil, calendar. If one also considers the ecclesiastical lunar rules, the lunisolar Easter computus cycle repeats only after 5,700,000 years of 2,081,882,250 days in 70,499,183 lunar months, based on an assumed mean lunar month of 29 days 12 hours 44 minutes '"`UNIQ--templatestyles-0000000B-QINU`"'2+49928114/70499183 seconds. (Seidelmann (1992), p. 582) [To properly function as an Easter computus, this lunisolar cycle must have the same mean year as the Gregorian solar cycle, and indeed that is exactly the case.]
↑  The extreme length of the Gregorian Easter computus is due to its being the product of the 19-year Metonic cycle, the thirty different possible values of the epact, and the least common multiple (10,000) of the 400-year and 2,500-year solar and lunar correction cycles.'"`UNIQ--ref-0000000D-QINU`"'
↑  The same result is obtained by summing the fractional parts implied by the rule: 365 + 1/4 − 1/100 + 1/400 = 365 + 0.25 − 0.01 + 0.0025 = 365.2425
↑  The last major Christian region to accept the Alexandrian rules was the Carolingian Empire (most of Western Europe) during 780–800. The last monastery in England to accept the Alexandrian rules did so in 931, and a few churches in southwest Asia beyond the eastern border of the Byzantine Empire continued to use rules that differed slightly, causing four dates for Easter to differ every 532 years.
1 2  Protestant states in Germany used an astronomical Easter from 1700 to 1774, based on Kepler's Rudolphine Tables, differing from the Gregorian Easter twice, one week early in 1724 and 1744.'"`UNIQ--ref-00000025-QINU`"'
↑  1919 in the regions comprising the former Kingdoms of Serbia and Montenegro (present-day Kosovo, Montenegro, Serbia and North Macedonia). The western and northern regions of what became Yugoslavia were already using the Gregorian calendar. For example, most of Slovenia adopted the Gregorian calendar at the same time as Áo in 1583. Coastal Croatia, which was at the time ruled by Venice, adopted the Gregorian calendar in 1582. Inland Croatia, ruled by the Habsburgs, adopted it in 1587 along with Hungary. The Gregorian calendar was used in Bosna và Hercegovina since the 16th century by the Catholic population and was formally adopted for government use in 1878 following occupation by Austria-Hungary.
↑  Lorraine reverted to Julian in 1735 and adopted Gregorian again in 1760
↑  "New Almanac according to the new reform".
↑  In 1793 France abandoned the Gregorian calendar in favour of the French Republican Calendar. This change was reverted in 1805.
Lunario Novo, Secondo la Nuova Riforma della Correttione del l'Anno Riformato da NS Gregorio XIII, được in tại Rome bởi Vincenzo Accolti năm 1582, một trong những ấn bản in đầu tiên của lịch mới.
Hình khắc trên mộ của Giáo hoàng Gregorius XIII, kỷ niệm sự việc ban hành lịch Gregorius.