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345th day of the year
- December 11 is the 345th day of the year (346th in leap years) in the Gregorian calendar; 20 days remain until the end of the year.
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When was the Gregorian calendar created?
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What is a Gregorian calendar?
It is a solar calendar based on a 365-day common year divided into 12 months of irregular lengths. 11 of the months have either 30 or 31 days, while the second month, February, has only 28 days during the common year.
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.
Apr 17, 2024 · Gregorian calendar, solar dating system now in general use. It was proclaimed in 1582 by Pope Gregory XIII as a reform of the Julian calendar. The Gregorian calendar differs from the Julian only in that no century year is a leap year unless it is exactly divisible by 400 (e.g., 2000).
- The Editors of Encyclopaedia Britannica
- What is the Gregorian calendar?The Gregorian calendar is a solar dating system used by most of the world. It is named for Pope Gregory XIII, who issued the papal bull Inter gravi...
- Why was the Gregorian calendar created?Although the Julian calendar was the dominant European dating system for more than 1,600 years, its solar year measurements (365.25 days versus the...
- When was the Gregorian calendar adopted?The Gregorian calendar was adopted by much of Catholic Europe in 1582, as directed by Pope Gregory XIII in the papal bull Inter gravissimas, which...
The growing discrepancy between the date set by the council and the actual vernal equinox was noted in the 8th century CE, if not earlier, and a number of proposals for reform were brought before popes in the Middle Ages. But no action was taken, and the Julian calendar, flawed as it was, remained the official calendar of the Christian church.
- The Editors of Encyclopaedia Britannica
The Gregorian calendar, also known as the Western or Christian calendar, is the most widely used calendar in the world today. Its predecessor, the Julian calendar, was replaced because it did not correctly reflect the actual time it takes the Earth to circle once around the Sun, known as a tropical year.
The Gregorian calendar is the calendar that is used throughout most of the world. It began being used in 1582. It replaced the previous Julian calendar because the Julian calendar had an error: it added a leap year (with an extra day every four years) with no exceptions.
The Gregorian calendar reform contained two parts: a reform of the Julian calendar as used prior to Pope Gregory’s time and a reform of the lunar cycle used by the Church, with the Julian calendar, to calculate the date of Easter. The reform was a modification of a proposal made by the Calabrian doctor Aloysius Lilius (or Lilio).
