Julian Date Converter – Convert Gregorian Date to Julian Date

Julian Date Converter Julian Date Converter

Hebrew calendar conversion

Hebrew Date Converter

Convert Gregorian dates into Hebrew calendar dates, or convert Hebrew dates back into Gregorian dates in the same focused workspace.

Enter a Gregorian date in YYYY-MM-DD format to convert it into a Hebrew calendar date.

Live output

Result

Ready to convert

Choose a direction, enter a Gregorian or Hebrew date, and the result appears here without leaving the page.

Guide

Convert Hebrew calendar dates and Gregorian dates

This Hebrew Date Converter changes Gregorian calendar dates into Hebrew calendar dates and converts Hebrew input back into Gregorian dates. It is intended for numeric date lookup where you need the Hebrew year, month, and day that correspond to a civil Gregorian date.

Gregorian input uses YYYY-MM-DD through the date field, while Hebrew input uses YYYY-MM-DD in the page's documented month numbering. The result also shows the Hebrew month label, which helps verify that the numeric month you entered maps to the intended part of the Hebrew year.

The Hebrew input month order starts at Tishri as month 01 and continues through Elul. Leap years can include Adar I and Adar II, and impossible leap-month combinations are rejected by round-trip validation so that an invalid input does not quietly become a different Hebrew date.

What it handles

Hebrew calendar conversion coverage

The converter supports both directions of the same Hebrew calendar calculation. It can start from a Gregorian date and report the Hebrew date, or start from the Hebrew numeric date accepted by the form and recover the Gregorian date.

Hebrew month numbering needs special care because common years and leap years do not use Adar in exactly the same way. The page keeps this logic visible through month labels and validation instead of assuming every year has the same set of months.

Gregorian to Hebrew

Enter a Gregorian date and return the matching Hebrew year, month number, day, month name, and weekday.

Hebrew to Gregorian

Enter a Hebrew date in YYYY-MM-DD format using the page's Tishri-first month order and convert it to Gregorian.

Leap-month validation

The converter checks Adar I, Adar II, and common-year month rules so invalid Hebrew dates do not silently shift.

How to use

Use the Hebrew conversion modes

Choose the conversion mode that matches your source date, then enter only that date. If you are converting from Hebrew to Gregorian, use the numeric month order documented on this page rather than a month name or a Nisan-first numbering scheme.

The converter treats each value as a civil calendar date at midnight UTC. It does not shift dates at local sunset, so users working with observance times should treat the result as a date conversion reference rather than a local ritual-time calculation.

1

Choose Gregorian to Hebrew

Use this direction for a Gregorian date such as 2026-06-30. The result includes the Hebrew date and month label.

2

Choose Hebrew to Gregorian

Use this direction for Hebrew input such as 5786-10-15. Month 01 is Tishri, month 02 is Heshvan, and the sequence continues through Elul.

3

Check leap-year month numbering

In leap years, month 06 is Adar I and month 07 is Adar II. In common years, month 07 is Adar and month 06 is not accepted as a real date.

Examples

Reference conversions from the local implementation

The examples below are produced by the same conversion functions used by the live form. They show how the page reports month numbers and month labels so you can compare the result with your own Hebrew date source.

Gregorian date to Hebrew date

2026-06-30 -> 5786-11-15

The Gregorian date 2026-06-30 converts to 15 Tammuz 5786 AM with this page's Hebrew calendar implementation.

Hebrew date to Gregorian date

5786-10-15 -> 2026-05-31

The Hebrew input 5786-10-15 converts back to Gregorian 2026-05-31.

FAQ

Hebrew date conversion notes

The most important details for Hebrew reverse conversion are month order, leap-month handling, and the civil-date assumption. These questions document those choices so the converter is not mistaken for a sunset-aware observance calendar.

What month numbering does Hebrew input use?

The input uses a civil order beginning with Tishri as month 01, then Heshvan, Kislev, Tevet, Shevat, Adar I or common-year handling, and onward through Elul.

How are Adar I and Adar II handled?

Leap years can include Adar I and Adar II. The converter validates the date by converting it through ICU and checking that the same year, month, and day come back.

Does this convert Hebrew dates at sunset?

No. The converter treats dates as civil calendar dates at midnight UTC. It does not model local sunset transitions or observance timing.

Reference

Calendar implementation reference

This converter uses PHP Intl calendar objects backed by ICU. The ICU calendar documentation describes the supported calendar services and identifiers that make the Hebrew calendar conversion reproducible in the application.