Gregorian to Hebrew (Jewish) Calendar Converter

Enter any Gregorian (Western) date and instantly convert it to the Jewish (Hebrew) calendar year, month, and day. Month names such as Tishrei and Nisan, the common-year vs. leap-year (13-month) status, and the weekday are all shown.

Input

Gregorian date

YYYY/MM/DD

Pick a Gregorian (Western) calendar date and the matching Jewish (Hebrew) calendar year, month, and day will be shown.

Result

Enter a Gregorian date.

How it works

The Gregorian (Western) date is first converted to a Julian Day Number (JDN), and the Hebrew calendar year, month, and day are derived from it. Routing through the JDN keeps the offsets between the two calendars exact.
The Hebrew year is roughly the Gregorian year plus 3760, but because it rolls over at Rosh Hashanah (1 Tishrei) in the autumn, dates late in the Gregorian year may map to Gregorian year plus 3761.
The Hebrew calendar is lunisolar: a common year has 12 months, while a leap year (7 times every 19 years) adds Adar II after the sixth month for 13 months. This tool also reports the common-year or leap-year status.
Month names begin with Tishrei, followed by Heshvan, Kislev, Tevet, Shevat, Adar, Nisan, Iyar, Sivan, Tammuz, Av, and Elul. Heshvan and Kislev can be either 29 or 30 days depending on the year.
The year start is determined using an established algorithm based on the molad (average time of the new moon) and the postponement rules. Because a Hebrew day begins at sunset, holiday dates may appear shifted by one day when reckoned from sunset.

Reviews

Tell us what you think of this calculator.