Hebrew date converter

How does the Hebrew calendar work?

The Hebrew calendar is lunisolar: months follow the moon (29 or 30 days), and a leap month (Adar II) is added seven times every nineteen years to stay aligned with the solar seasons. Days begin at nightfall, not midnight.

How do I find a yahrzeit date?

A yahrzeit is observed on the Hebrew date of death each year. Convert the Gregorian date of death to its Hebrew date above, then convert that Hebrew date back for any upcoming year to find when to observe it. If the death occurred after nightfall, use the next day's Hebrew date.

Why does my Hebrew birthday move around the civil calendar?

Because Hebrew months track the moon while the civil calendar tracks the sun, the same Hebrew date lands on a different Gregorian day each year — usually drifting within a few weeks.