Lunisolar calendar used today for Jewish religious observance, and as an official calendar of the state of Israel.- Hebrew calendar
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Calendar in many cultures, combining lunar calendars and solar calendars.
Hebrew, Hindu, Jain and Kurdish as well as the traditional Chinese, Japanese, Korean, Mongolian, Tibetan, and Vietnamese calendars (in the East Asian Chinese cultural sphere), plus the ancient Hellenic, Coligny, and Babylonian calendars are all lunisolar.
Time between two successive syzygies of the same type: new moons or full moons.
Yet others use calculation, of varying degrees of sophistication, for example, the Hebrew calendar or the ecclesiastical lunar calendar.
Geonim (גאונים; ; also transliterated Gaonim, singular Gaon) were the presidents of the two great Babylonian Talmudic Academies of Sura and Pumbedita, in the Abbasid Caliphate, and were the generally accepted spiritual leaders of the Jewish community worldwide in the early medieval era, in contrast to the Resh Galuta (exilarch) who wielded secular authority over the Jews in Islamic lands.
The period of the Geonim began in 589 CE (Hebrew date: 4349), after the period of the Sevora'im, and ended in 1038 (Hebrew date: 4798).
Calendar based on the monthly cycles of the Moon's phases , in contrast to solar calendars, whose annual cycles are based only directly on the solar year.
Such holidays include Rosh Hashanah (Hebrew calendar); Easter (the Computus); the Chinese, Korean, Vietnamese, and Mongolian New Year (Chinese, Korean, Vietnamese, and Mongolian calendars, respectively); the Nepali New Year (Nepali calendar); the Mid-Autumn Festival and Chuseok (Chinese and Korean calendars); Loi Krathong (Thai calendar); Sunuwar calendar; Vesak/Buddha's Birthday (Buddhist calendar); Diwali (Hindu calendars); Ramadan, Eid al-Fitr and Eid al-Adha (Islamic calendar).
Epoch or reference epoch is an instant in time chosen as the origin of a particular calendar era.
Anno Mundi (years since the creation of the world) as used in the Hebrew calendar (3761 BC).
Common Era (CE) and Before the Common Era (BCE) are year notations for the Gregorian calendar (and its predecessor, the Julian calendar), the world's most widely used calendar era.
Although Jews have their own Hebrew calendar, they often use the Gregorian calendar, without the AD prefix.
Period of almost exactly 19 years after which the lunar phases recur at the same time of the year.
In the Babylonian and Hebrew lunisolar calendars, the years 3, 6, 8, 11, 14, 17, and 19 are the long (13-month) years of the Metonic cycle.
Insertion of a leap day, week, or month into some calendar years to make the calendar follow the seasons or moon phases.
Whether to insert an intercalary month in a given year may be determined using regular cycles such as the 19-year Metonic cycle (Hebrew calendar and in the determination of Easter) or using calculations of lunar phases (Hindu lunisolar and Chinese calendars).
Lunisolar calendar with years consisting of 12 lunar months, each beginning when a new crescent moon was first sighted low on the western horizon at sunset, plus an intercalary month inserted as needed by decree.
During the 6th century BC Babylonian captivity of the Jews, the Babylonian month names were adopted into the Hebrew calendar.
Jewish holidays, also known as Jewish festivals or Yamim Tovim (ימים טובים, or singular יום טוב Yom Tov, in transliterated Hebrew ), are holidays observed in Judaism and by Jews throughout the Hebrew calendar.