Hebrew date converter: Jewish dates to Gregorian and back
This free Hebrew date converter changes a Gregorian date into the Jewish calendar date — in English and in Hebrew letters, such as ח׳ חשון תשפ״ז — and a Hebrew date back into the Gregorian calendar. Type in either box and the other follows, with the weekday, the length of the month, whether the year is a leap year, a month calendar and the festivals of that Hebrew year.
Because the Hebrew day begins at sunset, there is an After sunset box for evening births and events. The page also works out Hebrew birthdays for the coming years and the bar mitzvah and bat mitzvah dates for a birth date, applying the usual rules for Adar in leap years and for the 30th of Cheshvan and Kislev.
How to use the Hebrew Date Converter
- Pick a date in the Gregorian date box, or press Today; tick After sunset if the moment was after nightfall.
- Or enter Day, Month and Year in the Hebrew box to convert a Jewish date to the Gregorian calendar. Choose Adar II only in leap years.
- Read the result in English and Hebrew letters, the year type and the month calendar (Shabbat days are highlighted).
- For a birth date, check the table of Hebrew birthdays and the bat mitzvah (12) and bar mitzvah (13) dates with the Shabbat on or after.
- Press Copy result to paste the conversion elsewhere.
Hebrew Date Converter features
Both directions
Gregorian to Hebrew and Hebrew to Gregorian in linked boxes, for the Hebrew years 5360 to 5999 (1599 to 2239).
Hebrew numerals
Days and years written in Hebrew letters with geresh and gershayim (ט״ו for 15, תשפ״ז for 5787).
Leap years and Adar
Seven leap years in every 19 add Adar I; the converter names Adar, Adar I and Adar II correctly and refuses Adar II in a common year.
Bar and bat mitzvah dates
The Hebrew birthday at 12 and 13, the Gregorian date it begins and the Shabbat on or after it.
Festivals of the year
Rosh Hashanah, Yom Kippur, Sukkot, Chanukah, Purim, Pesach, Shavuot, Tisha B’Av and more for the Hebrew year shown.
How the Hebrew calendar works
The Jewish calendar is lunisolar. Months follow the Moon and have 29 or 30 days; seven years in every 19-year cycle (years 3, 6, 8, 11, 14, 17 and 19) add a 13th month, Adar I, so that Pesach stays in spring. The year begins on Rosh Hashanah, 1 Tishrei, whose date is fixed by the calculated molad (mean new moon) and four postponement rules (dechiyot) — for example, Rosh Hashanah never falls on a Sunday, Wednesday or Friday. Cheshvan and Kislev can each have 29 or 30 days, so a common year has 353, 354 or 355 days and a leap year 383, 384 or 385.
The conversion here is pure arithmetic — the method set out by Reingold and Dershowitz in Calendrical Calculations — so it needs no tables and gives the same answer offline. The automatic test compares it with your browser’s own Hebrew calendar on every day from 1900 to 2100 and with dates from the Hebcal converter, including Adar I and Adar II in 5784 and 5787 (checked 19 October 2026).
| Gregorian | Hebrew date | Hebrew letters |
|---|---|---|
| 12 September 2026 | 1 Tishrei 5787 (Rosh Hashanah) | א׳ תשרי תשפ״ז |
| 19 October 2026 | 8 Cheshvan 5787 | ח׳ חשון תשפ״ז |
| 9 March 2027 | 30 Adar I 5787 | ל׳ אדר א׳ תשפ״ז |
| 23 March 2027 | 14 Adar II 5787 (Purim) | י״ד אדר ב׳ תשפ״ז |
| 22 April 2027 | 15 Nisan 5787 (Pesach) | ט״ו ניסן תשפ״ז |
Hebrew birthdays, bar mitzvah and bat mitzvah
A Hebrew birthday falls on the same Hebrew day each year. Someone born in Adar of a common year marks it in Adar II in a leap year; someone born in Adar I or Adar II keeps that month when the year has both, and uses Adar when it has only one. A birthday on 30 Cheshvan or 30 Kislev moves to the 1st of the next month in years where that 30th day does not exist, and 30 Adar I becomes 1 Nisan in a common year. These are the rules used by Hebcal.
A boy becomes bar mitzvah on his 13th Hebrew birthday. Orthodox practice marks a girl’s bat mitzvah at 12, and many communities at 13. The celebration and Torah reading are often on the Shabbat on or after the birthday, which the table shows; the weekly portion, Israel/diaspora differences and local customs are not calculated here, so confirm with your rabbi.
For this week’s candle-lighting times see Shabbat times; other calendars include the Hijri date converter and Easter dates.
Hebrew Date Converter FAQ
What is the Hebrew date today?
Press Today. If it is already after sunset where you are, tick After sunset — the next Hebrew date has begun.
How do I convert a Hebrew date to an English date?
Enter the day, month and year in the Hebrew box. The Gregorian date appears at once; the Hebrew day itself began at sunset the evening before.
How do I find a bar mitzvah date?
Enter the birth date in the Gregorian box (tick After sunset for an evening birth). The table shows the 13th Hebrew birthday, the Gregorian date and the Shabbat on or after it.
What is Adar I and Adar II?
In a Jewish leap year an extra month is added before Adar: Adar I. The regular Adar becomes Adar II, and Purim is kept on 14 Adar II.
Is this Hebrew date converter accurate?
Yes for the fixed Hebrew calendar in use today: it agreed with the browser’s Hebrew calendar on every day 1900–2100 and with Hebcal’s dates in the test. Dates before about 1600 are not covered.
Why is my Hebrew birthday a different Gregorian date each year?
The Hebrew year is lunisolar and drifts against the Gregorian year by up to about three weeks before a leap month brings it back.