Hebrew calendar

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The Hebrew calendar (Hebrew: הַלּוּחַ הָעִבְרִי, romanized: HaLuakh ha'Ivri, IPA: [ha‿ˈluaχ ha‿ʔivˈʁi]), also called the Jewish calendar, is a lunisolar calendar used today for Jewish religious observance and as an official calendar of Israel. It determines the dates of Jewish holidays and other rituals, such as yahrzeits, and the scheduling of public Torah readings. In Israel, it is used for religious and agriculture purposes, and is also an official calendar for civil holidays alongside the Gregorian calendar. Like other lunisolar calendars, the Hebrew calendar consists of months of 29 or 30 days that begin and end at approximately the time of the new moon. As 12 such months comprise a total of just 354 days, an extra lunar month is added every 2 or 3 years so that the long-term average year length closely approximates the actual length of the solar year. Originally, the beginning of each month was determined based on physical observation of a new moon, while the decision of whether to...

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