<P> Jewish holidays, also known as Jewish festivals or Yamim Tovim (ימים טובים, "Good Days", or singular יום טוב Yom Tov, in transliterated Hebrew (English: / ˈjɔːm ˈtɔːv, joʊm ˈtoʊv /)), are holidays observed in Judaism and by Jews throughout the Hebrew calendar and include religious, cultural and national elements, derived from three sources: Biblical mitzvot ("commandments"); rabbinic mandates; Jewish history and the history of the State of Israel . Jewish holidays occur on the same dates every year in the Hebrew calendar, but the dates vary in the Gregorian . This is because the Hebrew calendar is a lunisolar calendar (i.e., based on the cycles of both the sun and moon), whereas the Gregorian is a solar calendar . </P> <P> Certain terms are used very commonly for groups of holidays . </P>

What is the name of the jewish celebrations