Tishri-years, often called the Jewish Civil Calendar, is an ancient calendar system used in Israel/Judea, and the Jewish diaspora. It is based on, and is a variation of, the Nisan-years, which is often called the Jewish Religious Calendar. Tishri-years is similar to, and sometimes equivalent to, the Ancient Macedonian calendar used by the Hellenistic empires (332-30 BCE). They are all lunisolar years beginning from Autumn, but could differ by a month.

Origin

The origin of the Tishri-years tradition can be traced to King David, who was ordained the king of Judah (the two southern tribes) on Tishri 1, 1010 BCE, before he was ordained the king of Israel (the ten northern tribes) on Nisan 1, 1002 BCE. It seemed that David still used the Nisan-years in chronicling his years, but King Solomon made it a national calendar commemorating his great father. After the split of the kingdom in 931/930 BCE, Israel continued using Nisan-years, while Judah used the Tishri-years.[1]

Structure

While the Nisan-years begin the year around the Vernal equinox (Gregorian March 20/21), the Tishri-years begin the years around the Autumn equinox (Gregorian September 22/23). The New Year's Day of the Tishri-years is called Rosh Hashanah ("Head of the Year"); it begins the High Holy Days of Israel.

Tishri 1, however, is not determined directly by its relationship to the Autumn Equinox. It depends on the determination of Nisan 1, which is the day after the new moon closest to the March equinox (within fifteen days before or after). Tishri 1 is the first day of the seventh month. Although the month number is always counted from Nisan, in the Tishri-years, the year begins and ends with Tishri 1.[2]

Months

Month Order Numbered Month Babylonian Name Jewish Name Canaanite Name Gregorian Months
1 Seventh Tishritu Tishri Ethanim September–October
2 Eighth Arahsamnu Heshvan/Marcheshvan Bul October–November
3 Ninth Kislimu Kislev November–December
4 Tenth Tebetu Tevet December–January
5 Eleventh Shabatu Shevat Tsakh January–February
6 Twelfth Addaru Adar February–March
7 First Nisanu Nisan Abib March–April
8 Second Aianu Iyyar Ziv April–May
9 Third Simanu Sivan May–June
10 Fourth Duzu Tammuz June–July
11 Fifth Abu Av July–August
12 Sixth Ululu Elul August–September

The intercalary month is still the second Adar, initially determined by agricultural observations in Israel. Although meteorological conditions may cause a few days of delay for each Rosh Codesh ("Head of the Month"), over all the errors will cancel each other, and the calendar system remained accurate.

After the fourth century CE, Hillel II fixed the Jewish Talmudic Calendar by a mathematical algorithm, in order for Jews all around the world to observe the feasts according to the same calendar. This caused the Jewish calendar to gradually depart from the actual seasons, due to the accumulated errors.[3]

The Jewish people kept on using the Tishri-years system throughout the first (Babylonian) and the second (Roman) Diaspora, until today. They also traced the system back till the time of creation.

See also

References

  1. ↑ Edwin R. Thiele, The Mysterious Numbers of the Hebrew Kings, rev. ed. (Grand Rapids: Kregal Publications).
  2. ↑ Finegan, Jack (2015). Handbook of Biblical Chronology. Peabody MA: Hendrickson. pp. 25–42. ISBN 9781619706415.
  3. ↑ A. O. Scheffler and P. P. Scheffler, Calmaster2000: Dates, Holidays, Astronomical Events (Pittsburgh, PA: Zephyr Services).
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