Hebrew Calendar Converter

You need the Hebrew date of a birth for a bar mitzvah, the yahrzeit of a relative, or you simply want to see which Jewish calendar day matches an ordinary date. Type the Gregorian date in the input field, formatted as 2026-05-15, and the page returns an estimate with Hebrew day, month name and year. The output labels itself as approximate, and it is worth understanding why before you rely on the number.

The Hebrew calendar is lunisolar and does not fit a fixed formula. Years run from 353 to 385 days, seven out of every nineteen gain an extra month called Adar I, and postponement rules shift Rosh Hashanah so certain holidays avoid forbidden weekdays. On top of that, the Hebrew day begins at sunset: a baby born at 9pm on a Tuesday was already born on the next Hebrew day. Arithmetic built on an average 365.25 day year captures none of this.

Treat the result as a rough sense of where you are in the year, never as an official date. Check the year in particular: in 2026 the Jewish calendar stands at 5786, and the number shown here does not match that count. Before engraving an invitation, setting a yahrzeit or scheduling a bar mitzvah, confirm with a community luach or an established converter. What the page does well is run entirely in your browser, sending your date nowhere.