Title: Hebrew calendar
Content:   The Hebrew calendar (הַלּוּחַ הָעִבְרִי), also called Jewish calendar, is a lunisolar calendar used today for Jewish religious observance, and as an official calendar of the state 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 
Title: Hebrew calendar
Content:  The Jewish calendar is based on the Metonic cycle of 19 years, of which 12 are common (non-leap) years of 12 months and 7 are leap years of 13 months. To determine whether a Jewish year is a leap year, one must find its position in the 19-year Metonic cycle. This position is calculated by dividing the Jewish year number by 19 and finding the remainder. (Since there is no year 0, a remainder of 0 indicates that the year is year 19 of the cycle.) For example, the Jewish year divided by 19 results in a remainder of, indicating that it is year  of the Metonic cycle. 
Title: Hebrew calendar
Content:  on 28 Iyar, Yom HaAliyah on 10 Nisan, and the Holocaust Commemoration Day on 27 Nisan. The Hebrew calendar is still widely acknowledged, appearing in public venues such as banks (where it is legal for use on cheques and other documents), and on the mastheads of newspapers. The Jewish New Year (Rosh Hashanah) is a two-day public holiday in Israel. However, since the 1980s an increasing number of secular Israelis celebrate the Gregorian New Year (usually known as "Silvester Night"—ליל סילבסטר) on the night between 31 December and 1 January. Prominent rabbis have on several occasions sharply denounced this practice, but with no noticeable effect on the secularist celebrants. Wall calendars commonly used in Israel are hybrids. Most are organised according to Gregorian rather than Jewish months, but begin in September, when the Jewish New Year usually falls, and provide the Jewish date in small characters.
Title: Jewish holidays
Content:   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. They include religious, cultural and national elements, derived from three sources: biblical mitzvot ("commandments"), rabbinic mandates, and the history of Judaism and 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 (based on the cycles of both the sun and moon), whereas the Gregorian is a solar calendar.
Title: Jewish and Israeli holidays 2000–2050
Content:  This is an almanac-like listing of major Jewish holidays from 2000 to 2050. All Jewish holidays begin at sunset on the evening before the date shown. On holidays marked "*", Jews are not permitted to work. Because the Hebrew calendar is governed by precise mathematical rules and no longer relies at all on observation, it is possible to provide the date in the Gregorian calendar that a holiday will fall on for the future.
Title: Hebrew birthday
Content: "A person wanting to know the civil date for celebrating a Jewish birthday ... must first determine the date within the Jewish calendar (not necessarily a straightforward procedure) and then determine the corresponding day in the civil calendar." The exercise is made more complicated by the fact that Jewish days start and end in the evening, so a person born after dusk will have the following day's date as their birthday. A Hebrew birthday (also known as a Jewish birthday) is the date on which a person is born according to the Hebrew calendar. This is important for Jews, particularly when calculating the correct date for day of birth, day of death, a bar mitzva or a bat mitzva. This is because the Jewish calendar differs from the secular and Christian Gregorian calendar as well as from the Islamic calendar, in most years the two birthdays do not coincide - typically, they coincide just once in 19 years.  Especially among Hasidic Jews, there is a custom that a boy's first haircut takes place on his third Hebrew birthday known as an upsherin.
Title: Jewish holidays
Content: 1 Tishrei (conventional "Rosh Hashanah"): "new year" for calculating calendar years, sabbatical-year (shmita) and jubilee cycles, and the age of trees for purposes of Jewish law; and for separating grain tithes. ; 15 Shevat (Tu Bishvat): "new year" for trees–i.e., their current agricultural cycle and related tithes. ; 1 Nisan: "New Year" for counting months and major festivals and for calculating the years of the reign of a Jewish king ; In biblical times, the day following 29 Adar, Year 1 of the reign of ___, would be followed by 1 Nisan, Year 2 of the reign of ___. ; In modern times, although the Jewish calendar year number changes on Rosh Hashanah, the months are still numbered from Nisan. ; The three pilgrimage festivals are always reckoned as coming in the order Passover-Shavuot-Sukkot. This can have religious law consequences even in modern times. ; 1 Elul (Rosh Hashanah LaBehema): "new year" for animal tithes. The Torah itself does not use any term like "New Year" in reference to Rosh Hashanah. The Mishnah in Rosh Hashanah specifies four different "New Year's Days" for different purposes:
Title: Hebrew calendar
Content:  Early Zionist pioneers were impressed by the fact that the calendar preserved by Jews over many centuries in far-flung diasporas, as a matter of religious ritual, was geared to the climate of their original country: the Jewish New Year marks the transition from the dry season to the rainy one, and major Jewish holidays such as Sukkot, Passover, and Shavuot correspond to major points of the country's agricultural year such as planting and harvest. Accordingly, in the early 20th century the Hebrew calendar was re-interpreted as an agricultural rather than religious calendar. After the creation of the State of Israel, the Hebrew calendar became one of the official calendars of Israel, along with the Gregorian calendar. Holidays and commemorations not derived from previous Jewish tradition were to be fixed according to the Hebrew calendar date. For example, the Israeli Independence Day falls on 5 Iyar, Jerusalem Reunification 
Title: Hebrew calendar
Content:  century Baraita of Samuel. According to rabbinic reckoning, the beginning of "year 1" is not Creation, but about one year before Creation, with the new moon of its first month (Tishrei) to be called molad tohu (the mean new moon of chaos or nothing). The Jewish calendar's epoch (reference date), 1 Tishrei AM 1, is equivalent to Monday, 7 October 3761 BCE in the proleptic Julian calendar, the equivalent tabular date (same daylight period) and is about one year before the traditional Jewish date of Creation on 25 Elul AM 1, based upon the Seder Olam Rabbah. Thus, adding 3760 before Rosh Hashanah or 3761 after to a Julian calendar year number starting from 
Title: Jewish religious year
Content: Hebrew calendar, the calendar basis for Jewish religious observances ; Jewish holiday, describing the Jewish Sabbath, festivals, and other observances throughout the year ; Weekly Torah reading, describing the annual cycle of Torah readings on the Sabbaths of the year ; Jewish prayer provides a gateway to resources about other liturgical variations over the course of the year The Jewish religious year consists of the events, observances and liturgies observed by Jews over the course of a year. Holidays and other observances are fixed on the Jewish, or Hebrew calendar, a lunisolar calendar, but float with respect to other calendars in widespread use, such as the Gregorian calendar. Further information on the Jewish religious year is available in the following articles:

Question: what year is it for the jewish calendar?
Answer: AM 5778.
5778.