<Ul> <Li> 1 March </Li> <Li> 2018 CE </Li> </Ul> <Ul> <Li> 14 Adar </Li> <Li> AM 5778 </Li> </Ul> <P> The Hebrew or Jewish calendar (הַלּוּחַ הָעִבְרִי ‬, Ha - Luah ha - Ivri) is a lunisolar calendar used today predominantly for Jewish religious observances . It determines the dates for Jewish holidays and the appropriate public reading of Torah portions, yahrzeits (dates to commemorate the death of a relative), and daily Psalm readings, among many ceremonial uses . In Israel, it is used for religious purposes, provides a time frame for agriculture and is an official calendar for civil purposes, although the latter usage has been steadily declining in favor of the Gregorian calendar . </P> <P> The present Hebrew calendar is the product of evolution, including a Babylonian influence . Until the Tannaitic period (approximately 10--220 CE), the calendar employed a new crescent moon, with an additional month normally added every two or three years to correct for the difference between twelve lunar months and the solar year . The year in which it was added was based on observation of natural agriculture - related events in Israel . Through the Amoraic period (200--500 CE) and into the Geonic period, this system was gradually displaced by the mathematical rules used today . The principles and rules were fully codified by Maimonides in the Mishneh Torah in the 12th century . Maimonides' work also replaced counting "years since the destruction of the Temple" with the modern creation - era Anno Mundi . </P>

What type of calendar is the jewish calendar