Yahrzeit Calculator
The recurring Hebrew-calendar anniversary of a death date, for any Gregorian year.
🔒 Runs entirely in your browser — nothing here is ever uploaded
About the Yahrzeit Calculator
Finds the Gregorian date of a Yahrzeit — the recurring Hebrew-calendar anniversary of a death — for any given Gregorian year.
- Enter the Gregorian date of death.
- Enter which Gregorian year you want the Yahrzeit date for.
- Read the Hebrew date of death and the Yahrzeit date in that year.
A death on January 15, 2020 (18 Tevet 5780) has its Yahrzeit fall on December 28, 2026 and again on January 17, 2028 — but nowhere in Gregorian year 2027, due to the winter-boundary drift described above.
A real, disclosed edge case: because the Hebrew calendar's lunisolar drift is uneven near the Gregorian year boundary, some winter-month anniversaries occur twice within one Gregorian year and are skipped entirely in the next — not an error, a genuine feature of how the two calendars interact. A second disclosed edge case: someone who died in Adar I of a Hebrew leap year has more than one accepted convention for which Adar to observe in a following non-leap year (since Adar I doesn't exist that year) — this calculator doesn't resolve that dispute.
- • If your target year shows no result, try the adjacent year — the anniversary may have landed there instead due to the drift described in the note above.
- jewish-date npm package — Hebrew calendar computation — accessed 2026-09-07