Jewish Birthday Calculator
Convert a civil birth date to the Hebrew calendar, account for a birth after sunset, and find the next matching Hebrew anniversary with clear handling options for Adar.
Jewish Birthday Calculator inputs
Enter the civil birth date, whether birth occurred before or after sunset, the search date and the preferred Adar anniversary custom.
Jewish Birthday Calculator results
How to use the Jewish birthday calculator
The Jewish birthday calculator converts the sunset-adjusted civil date to the Hebrew calendar and searches day by day for the next matching Hebrew month and day. Unknown sunset timing produces both possible anniversaries.
The Hebrew day begins at sunset
The Jewish birthday calculator first converts the Gregorian civil date with the browser’s Hebrew calendar implementation. Because a Hebrew date changes at sunset rather than midnight, a birth after sunset belongs to the next Hebrew calendar day. When the time is unknown, the result clearly states that two adjacent Hebrew dates may need to be checked.
Finding the next Hebrew anniversary
The calculator scans forward from the selected date and matches the Hebrew month and day rather than simply adding a fixed number of Gregorian days. That is necessary because Hebrew years can contain 12 or 13 months and have variable lengths. The result therefore follows the calendar sequence rather than an average-year approximation.
Adar in leap years
Adar creates a genuine rule choice. A birthday in ordinary Adar can correspond to Adar I or Adar II in a Hebrew leap year depending on community practice and the purpose of the observance. The calculator provides explicit options and reports the selected convention rather than presenting one religious ruling as universal.
Calendar result versus religious guidance
This tool calculates dates; it does not determine halachic obligations, bar or bat mitzvah status, yahrzeit practice, candle-lighting time or the exact local sunset. For a religiously significant decision, verify the date, location, sunset and community custom with a qualified rabbi or trusted calendar authority.
Hebrew birthday calculator search intent
This existing Jewish birthday calculator now also answers Hebrew birthday calculator searches on the same canonical page. It converts the civil birth date, applies the after-sunset day boundary, shows the Hebrew date and finds the next anniversary without creating a competing Hebrew-calendar birthday URL. Adar handling remains an explicit user choice because custom and observance can differ.
Jewish Birthday Calculator questions
Why does after sunset change the Hebrew date?
The Hebrew calendar day begins at sunset, so the evening portion of a civil date belongs to the next Hebrew date.
Why can Adar birthdays differ between calendars?
Hebrew leap years add a second Adar. Communities and observances can follow different conventions for an ordinary-Adar birthday.
Does this calculator find local sunset?
No. It asks whether the birth was before or after sunset. Exact historical sunset requires location and time-zone data.