Hebrew calendar

This figure, in a detail of a medieval Hebrew calendar, reminded Jews of the palm branches ( Lulav ) and the citron ( Etrog ) to be brought to the synagogue at the end of sukkot , closing the solemn convocations of the calendar in autumn. The Hebrew calendar or Jewish calendar is the annual calendar used in Judaism . It determines the Jewish holidays , which Torah portions to read, Yahrzeits , and which set of Psalms should be read each day. Originally observational, it is now a rule-based lunisolar calendar , using both lunar months and years defined via a solar cycle. This is in contrast to the Gregorian calendar , which is based solely upon a solar cycle, or the Islamic calendar , which is purely lunar. Although the Chinese calendar is also a lunisolar calendar, its rules are totally different. All seasons mentioned here are Northern Hemisphere seasons because the Hebrew calendar developed in the region east of the Mediterranean Sea .

Jewish calendar, showing Adar II between 1927 and 1948 The Hebrew or Jewish calendar ( , ha'luach 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 . 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. When to add it was based on observation of natural agriculture-related events. 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 . The Hebrew lunar year is about eleven days shorter than the solar cycle and uses the 19-year Metonic cycle to bring it into line with the solar cycle, with the addition of an intercalary month every two or three years, for a total of seven times per 19 years. Even with this intercalation, the average Hebrew calendar year is longer by about 6 minutes and 40 seconds than the current mean solar year , so that every 217 years the Hebrew calendar will fall a day behind the current mean solar year; and about every 231 years it will fall a day behind the Gregorian calendar year. The era used since the middle ages is the Anno Mundi epoch ( Latin for "in the year of the world"; Hebrew : , "from the creation of the world"). As with Anno Domini ( A.D. or AD ), the words or abbreviation for Anno Mundi ( A.M. or AM ) for the era should properly precede the date rather than follow it, although this is no longer always followed. AM 5774 began at sunset on 4 September 2013 and ended on 24 September 2014. AM 5775 began at sunset on 24 September 2014 and ends at sunset on 13 September 2015. AM 5776 begins at sunset on 13 September 2015 and ends at sunset on 2 October 2016. Specifically, the ripening of the barley crop; the age of the kids, lambs, and doves; the ripeness of the fruit trees; and the relation of the date to the tekufah (seasons).

Lunisolar calendar used for Jewish religious observances Jewish calendar, showing Adar II between 1927 and 1948 The Hebrew or Jewish calendar ( Hebrew : 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 . 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 ancient 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 . The Hebrew lunar year is about eleven days shorter than the solar year and uses the 19-year Metonic cycle to bring it into line with the solar year, with the addition of an intercalary month every two or three years, for a total of seven times per 19 years. Even with this intercalation, the average Hebrew calendar year is longer by about 6 minutes and 40 seconds than the current mean tropical year , so that every 217 years the Hebrew calendar will fall a day behind the current mean tropical year; and about every 238 years it will fall a day behind the mean Gregorian calendar year. The era used since the Middle Ages is the Anno Mundi epoch ( Latin for "in the year of the world"; , "from the creation of the world"). As with Anno Domini (A.D. or AD), the words or abbreviation for Anno Mundi (A.M. or AM) for the era should properly precede the date rather than follow it. AM 5786 began at sunset on 22 September 2025 and will end at sunset on 11 September 2026. Specifically, the ripening of the barley crop; the age of the kids, lambs, and doves; the ripeness of the fruit trees; and the relation of the date to the tekufah (seasons). (Although this is a self-published website, fundamentally this is a calculation, which is outlined clearly in the reference.) This and certain other calculations in this article are now provided by a template ( ).

Lunisolar calendar used for Jewish religious observances Jewish calendar, showing Adar II between 1927 and 1948 The Hebrew calendar ( ), 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 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 holidays alongside the Gregorian calendar . The present Hebrew calendar is the result of a process of development, 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 the lunar year of twelve lunar months and the solar year . The year in which it was added was based on observation of natural agriculture-related events in ancient Israel. Through the Amoraic period (200–500 CE) and into the Geonic period , this system was gradually displaced by the mathematical rules of the Metonic cycle 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 . The Hebrew lunar year is about 11 days shorter than the solar year and uses the 19-year Metonic cycle to bring it into line with the solar year, with the addition of an intercalary month every two or three years, for a total of seven times per 19 years. Even with this intercalation, the average Hebrew calendar year is longer by about 6 minutes and 40 seconds than the current mean tropical year , so that every 216 years the Hebrew calendar will fall a day behind the current mean tropical year. The era used for the calendar since the Middle Ages is Anno Mundi ( Latin : "in the year of the world"; , "from the creation of the world"). As with Anno Domini (A.D. or AD), the words or abbreviation for Anno Mundi (A.M. or AM) for the era should properly precede the date rather than follow it. The epoch of this era is the moment when, according to the Genesis creation narrative , the world was created. The current Hebrew year, AM 5786, began at sunset on 22 September 2025 and will end at sunset on 11 September 2026. There are <ref group=lower-alpha> tags or templates on this page, but the references will not show without a template or template (see the help page ). Mapping time: the calendar and its history .

Lunisolar calendar used for Jewish religious observances Jewish calendar, showing Adar II between 1927 and 1948 [ refresh ] The Hebrew calendar ( Hebrew : הַלּוּחַ הָעִבְרִי ‎ ), 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 schedule of public Torah readings . In Israel, it is used for religious purposes, provides a time frame for agriculture, and is 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 which 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 add the leap month was based on observation of natural agriculture-related events in ancient Israel . Between the years 70 and 1178, these empirical criteria were gradually replaced with a set of mathematical rules. Month length now follows a fixed schedule which is adjusted based on the molad interval (a mathematical approximation of the mean time between new moons) and several other rules , while leap months are now added in 7 out of every 19 years according to the Metonic cycle . Nowadays, Hebrew years are generally counted according to the system of Anno Mundi ( Latin : "in the year of the world"; Hebrew : מבריאת העולם ‎ , "from the creation of the world", abbreviated AM). This system attempts to calculate the number of years since the creation of the world according to the Genesis creation narrative and subsequent Biblical stories. The current Hebrew year, AM 5786, began at sunset on 22 September 2025 and will end at sunset on 11 September 2026. Tosefta Sanhedrin 2:2 "The year may be intercalated on three grounds: aviv [i.e.the ripeness of barley], fruits of trees, and the equinox.