Hebrew birthday calculator
Enter a date of birth and this gives you the Hebrew date, and the day the Hebrew birthday falls on for the next twenty years.
Type a date, or open the calendar
What a Hebrew birthday is
Your Hebrew birthday is the day and month of the Hebrew calendar you were born on. It is the date that decides when a bar or bat mitzvah falls, and in many families it is kept alongside the civil birthday rather than instead of it.
Because the Hebrew year is shorter than the civil one and corrects itself with a leap month, the two birthdays drift apart and then snap back. They coincide roughly once every nineteen years - which is why a nineteenth or thirty-eighth birthday often falls on both at once.
Born after sunset
The Hebrew day begins at sunset. A baby born at eight in the evening was already born into the next Hebrew date, so the birthday is a day later than converting the civil date would suggest.
If you know the time of birth, use it. If you do not, the civil date as written is the usual assumption.
Born in Adar, in a leap year
Seven years in nineteen have two Adars. Somebody born in Adar of an ordinary year has a choice of months in a leap year, and the common ruling for a bar mitzvah is that it follows Adar II. Someone born in Adar I or Adar II of a leap year keeps that same month.
For a bar or bat mitzvah this is worth confirming with your rabbi, because the date decides the ceremony.
The 30th of Cheshvan and Kislev
Both months have either twenty-nine or thirty days. A birthday on the 30th simply has no date in the years where that month is short, and the table below shows those years as having no date rather than quietly moving it.
Common questions
How do I find my Hebrew birthday?
Enter your civil date of birth above. The Hebrew date appears immediately, along with the civil day it falls on for the next twenty years.
Why is my Hebrew birthday a different day each year?
The Hebrew year is about eleven days shorter than the civil year, and a leap month is added seven times in nineteen years to keep the festivals in their seasons. The Hebrew date stays the same; the civil date it lands on moves.
Which birthday decides a bar mitzvah?
The Hebrew one - the thirteenth Hebrew birthday for a boy, the twelfth for a girl. If the birth was in Adar, confirm the month with your rabbi.
Can I have this in my calendar every year?
Yes. A free family calendar puts the Hebrew birthday into Google, Apple or Outlook on the right day every year, for everyone in the family at once.