Jewish Holiday Calculator

Calculate Gregorian dates for Rosh Hashanah, Yom Kippur, Passover, Hanukkah, and other major Jewish holidays using the Hebrew calendar.

About the Hebrew calendar

The Hebrew (Jewish) calendar is a lunisolar calendar used for Jewish religious observance. It tracks both the lunar cycle and the solar year through a 19-year cycle of common and leap years.

Dates shown are the Gregorian dates on which each holiday begins at sunset. Observance begins at sunset on the evening before the date shown.

Major holidays in 2026

Passover (Pesach)
Apr 1, 2026
15 Nisan
Shavuot
May 21, 2026
6 Sivan
Rosh Hashanah
Sep 11, 2026
1 Tishrei
Yom Kippur
Sep 20, 2026
10 Tishrei
Sukkot
Sep 25, 2026
15 Tishrei
Hanukkah
Dec 4, 2026
25 Kislev

Other observances

Tu BiShvat
Feb 1, 2026
15 Shevat
Purim
Mar 2, 2026
14 Adar
Yom HaShoah
Apr 13, 2026
27 Nisan
Yom HaAtzmaut
Apr 21, 2026
5 Iyar
Lag BaOmer
May 4, 2026
18 Iyar
Tisha B'Av
Jul 22, 2026
9 Av
Shemini Atzeret
Oct 2, 2026
22 Tishrei
Simchat Torah
Oct 3, 2026
23 Tishrei

About these dates

Observance begins at sunset on the evening before the date shown. Holiday lengths vary: Passover is observed for seven days in Israel and eight days in the Diaspora; Hanukkah lasts eight days; most other holidays listed are one or two days.

Yom HaShoah, Yom HaAtzmaut, and Lag BaOmer are modern observances. Simchat Torah is celebrated on 23 Tishrei outside Israel and on 22 Tishrei (Shemini Atzeret) in Israel.

Also in Religious Holidays

Dates & Time

Jewish Holiday Calculator

Calculate Gregorian dates for major Jewish holidays in any year using the deterministic Hebrew calendar algorithm.

How It Works

The Hebrew calendar is a lunisolar system with months based on lunar cycles and leap months added in a 19-year Metonic cycle. This calculator uses the molad (new moon) calculation with the four postponement rules to determine Rosh Hashanah, then derives all other holidays by fixed offsets within the Hebrew year.

Sunset Convention

In the Hebrew calendar, days begin at sunset. The dates shown represent the Gregorian date on which the holiday begins at sunset. Observance continues through the following day.

Frequently asked questions

Why do Jewish holidays fall on different Gregorian dates each year?

The Hebrew calendar is lunisolar, so its months track the moon while the year tracks the sun. Leap months are added periodically, causing Gregorian dates to shift.

What are the postponement rules?

The four dehiyot ensure Rosh Hashanah does not fall on certain days of the week and prevent the year from having an invalid length. They can delay Rosh Hashanah by one or two days.

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