What is the Hebrew calendar?

The Hebrew (Jewish) calendar is a lunisolar calendar that tracks both the lunar cycle (months) and the solar cycle (years). It is used to determine Jewish holidays, Torah readings, and lifecycle events. The calendar counts years from the traditional date of creation, placing the current era around year 5780–5790.

What year is it in the Hebrew calendar?

Add approximately 3,760 to the Gregorian year, but note the Hebrew year changes in autumn (around September–October). For example, the Gregorian year 2024 overlaps with Hebrew years 5784 and 5785. Use this tool with today's date for the exact current Hebrew date.

What are the months of the Hebrew calendar?

The 12 regular months are: Tishrei, Cheshvan, Kislev, Tevet, Shevat, Adar, Nisan, Iyar, Sivan, Tammuz, Av, and Elul. In a leap year, an extra month called Adar I (or Adar Rishon) is inserted before Adar II (the regular Adar).

Why does the Hebrew calendar have leap years?

Because 12 lunar months are about 11 days shorter than a solar year, the Hebrew calendar inserts a 13th month (Adar I) in 7 out of every 19 years (the Metonic cycle). This keeps the lunar months aligned with the seasons so that Passover always falls in spring.

What is the earliest date this tool can convert?

The algorithm supports dates from 1 Tishrei 1 AM (Hebrew year 1) onwards, which corresponds to approximately 6 October 3761 BC in the proleptic Gregorian calendar. Very early dates may have limited historical accuracy.

Is this calculation rabbinically authoritative?

This tool uses the standard mathematical (calculated) Hebrew calendar, which is the same algorithm used universally in diaspora Jewish communities. It does not account for local rabbinic decisions or the ancient observed (empirical) calendar.

Hebrew Calendar Converter

Convert any Gregorian date to the Hebrew (Jewish) calendar date, or convert a Hebrew date back to the Gregorian equivalent — instantly in your browser.

Conversion Input

Year

Month

Day

Quick examples:

Result

Enter a date and click Convert

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Summary

The Hebrew (Jewish) calendar is a lunisolar calendar that combines lunar months with solar years. A regular year has 12 months and a leap year has 13 months, with years ranging from 353 to 385 days. The epoch is 1 Tishrei 1 AM (Anno Mundi), traditionally corresponding to the year of creation, which aligns roughly with 3761 BC in the Gregorian calendar. This tool converts between Gregorian civil dates and Hebrew calendar dates using the standard proleptic Hebrew calendar algorithm.

How it works

Choose a conversion direction: Gregorian to Hebrew, or Hebrew to Gregorian.
Enter a Gregorian date (year, month, day) or a Hebrew date (year, month, day).
Click Convert to see the result with the full Hebrew month name and year.
Use the "Today" button to quickly load the current date.
Quick examples let you explore notable Hebrew calendar dates.

Use cases

Find today's date in the Hebrew calendar for religious observance.
Convert Jewish holidays or lifecycle events to Gregorian dates.
Research historical events in their Hebrew calendar context.
Calculate Hebrew birth dates or anniversaries (Yahrzeits).
Verify correspondence between civil and Jewish calendar dates.
Educational exploration of the Hebrew lunisolar calendar system.

Frequently Asked Questions

Last updated: 2026-05-28 · Reviewed by Nham Vu