Hebrew Date Converter

How to Use the Hebrew Date Converter

The Hebrew date converter above converts any date between the Gregorian calendar and the Jewish calendar, in both directions. To convert a Gregorian date to a Hebrew date, simply pick the date and the converter shows the Hebrew date instantly, in both English transliteration and Hebrew letters, along with the Jewish year. To convert a Hebrew date to a Gregorian date, select the Jewish year, month, and day, and the converter shows the exact civil date it falls on, including the day of the week.

One detail makes all the difference when converting dates: a day on the Jewish calendar runs from nightfall to nightfall, not from midnight to midnight. An event that took place on a Tuesday evening after sunset actually belongs to Wednesday’s Hebrew date. If you are converting a date for something that happened in the evening, tick the after-sunset option and the converter will move the Hebrew date forward by one day for you. This matters most for yahrzeits and Hebrew birthdays, where landing on the wrong day means observing the date a day early every single year.

Why Hebrew Dates Move Around the Gregorian Calendar

The Jewish calendar is lunisolar: its months follow the moon, while its years stay aligned with the seasons. A lunar year of twelve months is about eleven days shorter than a solar year, so the calendar adds a thirteenth month, Adar I, seven times in every nineteen-year cycle. That is why the same Hebrew date drifts across a window of about a month on the Gregorian calendar — Passover can begin anywhere from late March to late April, and your Hebrew birthday rarely lands on the same civil date two years in a row.

The converter handles all of this automatically, including the leap-year switch between Adar, Adar I, and Adar II. If you select a date in Adar of a regular year, the converter knows that in a leap year the same observance moves to Adar II, and a date in Adar II converts back to plain Adar in a regular year. It also handles dates that fall on the 30th of Cheshvan or Kislev, the two months that change length from year to year.

Common Conversions

The converter is most often used to find the Hebrew date of a birthday, a wedding anniversary, or a yahrzeit — the Hebrew anniversary of a loved one’s passing, observed each year on the Hebrew date rather than the civil one. It also answers questions in the other direction: when a ketubah, a gravestone, or an old family document shows only a Hebrew date, the converter tells you exactly which Gregorian date it refers to. Because the conversion is calculated mathematically rather than looked up in a table, it works for any date, hundreds of years into the past or the future.

If you are converting a birthday, the Hebrew birthday calculator goes a step further: it finds the Hebrew birthday and then lists the Gregorian dates of the next ten Hebrew birthdays, along with the bar or bat mitzvah date. And once you have your dates, you can add them to a free printable Jewish calendar that repeats them on the correct Hebrew date every year, alongside all the Jewish holidays.

Frequently Asked Questions

How do I convert a Gregorian date to a Hebrew date?

Enter the date in the converter at the top of this page. The Hebrew date appears instantly in English and in Hebrew letters, together with the Jewish year. If the event took place after sunset, tick the after-sunset box, because the Jewish day begins at nightfall.

How do I convert a Hebrew date to an English date?

Use the second panel of the converter. Choose the Jewish year, then the month and day, and the converter shows the Gregorian date along with the day of the week. The list of months adjusts automatically in leap years to include Adar I and Adar II.

Why is my Hebrew birthday on a different date every year?

The Jewish calendar follows lunar months, so its dates shift against the Gregorian calendar from year to year, moving within a window of about a month. The Hebrew date itself never changes — only the civil date it falls on.

What happens to dates in Adar during a leap year?

In a Jewish leap year there are two months of Adar. Observances from a regular Adar, including Purim, are kept in Adar II. The converter applies this rule automatically, so a date entered in Adar converts correctly whether the target year is a leap year or not.

Does the converter work for dates before 1900?

Yes. The conversion is calculated directly from the rules of the Hebrew calendar rather than from a lookup table, so it works for any date across hundreds of years, past or future.