Convert any civil date to its accurate Hebrew calendar equivalent with our free Gregorian to Jewish calendar converter. Instantly find the Hebrew day, month, year, Torah portion (Parsha), and corresponding Jewish holidays for birthdays, Yahrzeits, bar/bat mitzvahs, or historic timelines.
Gregorian to Jewish Calendar
Convert Jewish Calendar to Gregorian Calendar
How to Convert Gregorian Calendar Dates to the Jewish Calendar
Converting a date between the standard civil (Gregorian) calendar and the traditional Jewish (Hebrew) calendar involves transitioning between two entirely different astronomical systems. Because of these differences, a simple mathematical offset is not enough to get an accurate conversion.
- Solar vs. Lunisolar Mechanics: The Gregorian calendar is strictly a solar system based on the Earth’s 365-day orbit around the Sun. Conversely, the Jewish calendar is lunisolar, meaning months are calculated based on the cycles of the moon, while the overall year aligns with the solar cycle.
- The 19-Year Metonic Cycle: Because a standard lunar year is roughly 11 days shorter than a solar year, the Jewish calendar uses a 19-year cycle that introduces a 30-day leap month (Adar I) seven times per cycle to ensure spring holidays like Passover (Nissan) always fall in their correct agricultural season.
- The Twilight Rule (Shkiah): In western timekeeping, a new day begins at midnight. In Jewish tradition, according to biblical chronology, the day begins at sunset (shkiah). If you are converting a date for an event that occurred after sundown, you must advance the Hebrew date by one full day.
Frequently Asked Questions (FAQs)
What is today’s date on the Jewish calendar?
Because the Hebrew calendar is dynamically shifting against the solar year, today’s date changes relative to civil calendars. Our app stays synced to the current date, automatically providing the precise Hebrew date for today upon page load.
How do I find my Hebrew birthday or a relative’s Yahrzeit?
To calculate a Hebrew birthday or a Yahrzeit (anniversary of a passing), use our date picker to select the exact Gregorian date of the occurrence. Crucially, verify whether the birth or passing occurred after sunset. If it did, toggle the sunset adjustment to ensure your ritual observances align with Halachic time limits.
Why does the Jewish year have 5700+ years?
The calculation of the Jewish calendar year begins from the traditional year of Creation (Anno Mundi), which aligns historically to 3761 BCE. To find the current Hebrew year during the fall/winter months, add 3761 to the current Gregorian year.
How does this tool handle the change in days during a leap year?
During a Jewish leap year (occurring 7 times every 19 years), an extra month called Adar I is added. The regular month of Adar becomes Adar II. Our backend code accounts for the exact position of the current year in the Metonic cycle to prevent date drift.
Understanding Jewish Months & Holiday Alignments
The Jewish calendar consists of 12 or 13 months, fluctuating between 29 and 30 days depending on the lunar phase. Important dates to convert include:
| Hebrew Month | Approximate Civil Months | Major Observances & Holidays |
|---|---|---|
| Tishrei | September – October | Rosh Hashanah, Yom Kippur, Sukkot |
| Kislev | November – December | Hanukkah |
| Nissan | March – April | Passover (Pesach) |
| Sivan | May – June | Shavuot |
Whether you are planning a traditional celebration, identifying your weekly Torah portion (Parsha), or conducting structural chronological research, our tool bridges historical calendars seamlessly.
Also see: Is There a Jewish Holiday Today?