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Such a calendar is called a tropical solar calendar [citation needed]. The duration of the mean calendar year of such a calendar approximates some form of the tropical year, usually either the mean tropical year or the vernal equinox year. The following are tropical solar calendars: Ancient Armenian calendar
It is a solar calendar that is designed to maintain synchrony with the mean tropical year. [34] It has a cycle of 400 years (146,097 days). Each cycle repeats the months, dates, and weekdays.
Retrieved from "https://en.wikipedia.org/w/index.php?title=Tropical_solar_calendar&oldid=1063076495"
The Julian calendar reform lengthened seven months and replaced the intercalary month with an intercalary day to be added every four years to February. It was based on a length for the year of 365 days and 6 hours (365.25 d), while the mean tropical year is about 11 minutes and 15 seconds less than that.
The Gregorian calendar, like the Julian calendar, is a solar calendar with 12 months of 28–31 days each. The year in both calendars consists of 365 days, with a leap day being added to February in the leap years. The months and length of months in the Gregorian calendar are the same as for the Julian calendar.
The Julian calendar is a solar calendar of 365 days in every year with an additional leap day every fourth year (without exception). 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 (also known as the Berbers).
In 1954 the committee recommended a fixed tropical solar calendar for use as a unified national civil calendar, which was adopted as the Indian national calendar. A tropical lunisolar calendar was also proposed for religious purposes but this recommendation was not accepted. India's first prime minister, Jawaharlal Nehru, in his preface to the ...
The sidereal year differs from the solar year, "the period of time required for the ecliptic longitude of the Sun to increase 360 degrees", [2] due to the precession of the equinoxes. The sidereal year is 20 min 24.5 s longer than the mean tropical year at J2000.0 (365.242 190 402 ephemeris days) .