What this site is
A converter between the Hebrew and Gregorian calendars, and the tools built on it: today’s Hebrew date, Shabbat times for 50 cities, the weekly Torah portion, holiday dates, yahrzeit, bar and bat mitzvah, Hebrew birthdays, the Omer count, gematria and a printable calendar. Everything is free and needs no sign-up.
How dates are calculated
- Date conversion follows the rules of the fixed Hebrew calendar (the molad, the postponement rules and the 19-year cycle), as set out in Dershowitz and Reingold’s Calendrical Calculations.
- The weekly portion follows the standard reading order, including combined portions and the Israel and diaspora schedules.
- Yahrzeits and birthdays follow the common rulings for short Cheshvan and Kislev and for Adar in leap years. Where customs differ, the result says so.
- Shabbat times use NOAA’s sunset formula, candle-lighting 18 minutes before sunset (40 in Jerusalem, 30 in Haifa), and havdalah at nightfall (sun 8.5° below the horizon) or your chosen time.
How it is checked
Every calculation is tested automatically against the widely used Hebcal library: date conversion for every day from 1700 to 2300, Torah portions from 1900 to 2200 for Israel and the diaspora, holidays from 1950 to 2100, yahrzeits, birthdays, the Omer and gematria. Sunset times match within one minute for all 50 cities.
Good to know
Dates and times follow the most common custom. For a question of Jewish law, and especially for a yahrzeit or bar mitzvah in a leap year, ask your rabbi. City Shabbat times are for the city centre; many communities light candles earlier.