Hebrew Birthday Calculator
Convert your Gregorian birthday to the Hebrew calendar and find your Hebrew date of birth
Try example dates:
Your Hebrew Birthday
Hebrew Day
Hebrew Month
Hebrew Year
Current Age
✨ Hebrew Zodiac Sign (Mazal)
Element:
🎂 Next Birthday
Your next Gregorian birthday:
days away📚 Hebrew Months Reference
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About Hebrew Birthday Calculator
The Hebrew Birthday Calculator converts your Gregorian (civil) birthday to the Hebrew calendar date. Discover your Jewish birthday, Hebrew zodiac sign, and the significance of your birth date in Jewish tradition.
What is the Hebrew Calendar?
The Hebrew calendar (also called the Jewish calendar) is a lunisolar calendar used for Jewish religious observances, holidays, and lifecycle events. Unlike the purely solar Gregorian calendar, the Hebrew calendar is based on both the moon (months) and the sun (years).
Key Characteristics
| Feature | Hebrew Calendar | Gregorian Calendar |
|---|---|---|
| Type | Lunisolar | Solar |
| Year Start | Tishrei (Sept/Oct) | January |
| Months | 12 or 13 | 12 |
| Days per Month | 29 or 30 | 28-31 |
| Leap Year | Extra month (Adar I) | Extra day (Feb 29) |
Hebrew Months
The Hebrew year has 12 months (13 in leap years):
| Month | Hebrew Name | Approximate Gregorian |
|---|---|---|
| 1 | Tishrei | Sept-Oct |
| 2 | Cheshvan | Oct-Nov |
| 3 | Kislev | Nov-Dec |
| 4 | Tevet | Dec-Jan |
| 5 | Shevat | Jan-Feb |
| 6 | Adar (Adar I*) | Feb-Mar |
| 7 | Adar II* | Mar-Apr |
| 8 | Nisan | Mar-Apr |
| 9 | Iyar | Apr-May |
| 10 | Sivan | May-Jun |
| 11 | Tammuz | Jun-Jul |
| 12 | Av | Jul-Aug |
| 13 | Elul | Aug-Sep |
*Adar II only appears in leap years. In leap years, Adar I is added before the regular Adar.
How to Calculate Your Hebrew Birthday
Our calculator uses the complex Hebrew calendar algorithm that includes:
- Molad Calculation - Computing the mean lunar conjunction
- Postponement Rules (Dechiyot) - Adjustments to prevent holidays from falling on certain days
- Leap Year Determination - Using the 19-year Metonic cycle
- Month Length Calculation - Determining 29 or 30 days per month
Hebrew Year Numbering
Hebrew years are counted from the traditional date of Creation (Anno Mundi). To estimate the Hebrew year:
- Before Rosh Hashanah (Sept/Oct): Gregorian year + 3760
- After Rosh Hashanah: Gregorian year + 3761
Example: December 25, 2024 = ~5785 Hebrew year
Celebrating Your Hebrew Birthday
In Jewish tradition, the Hebrew birthday is significant for:
- Bar/Bat Mitzvah - Calculated by Hebrew date
- Yahrzeit - Memorial anniversaries
- Birthday blessings - Reading the Torah on your Hebrew birthday
- Personal reflection - A day for spiritual growth
Sunset Consideration
In the Hebrew calendar, a new day begins at sunset, not midnight. If you were born after sunset, your Hebrew birthday may be one day later than expected. For the most accurate conversion, consider:
- Births before sunset → Use the Gregorian date
- Births after sunset → Use the next day's Hebrew date
Frequently Asked Questions
Why does my Hebrew birthday fall on different Gregorian dates each year?
The Hebrew calendar is lunisolar, meaning months follow the moon's cycle (~29.5 days). This causes Hebrew dates to shift relative to the solar-based Gregorian calendar, typically within a 30-day window.
What if I was born in Adar during a non-leap year?
If you were born in Adar during a regular year, you celebrate in the regular Adar (or Adar II in leap years). If born in Adar I or Adar II during a leap year, traditions vary on when to celebrate during non-leap years.
Is this calculator accurate?
Our algorithm uses the standard Hebrew calendar calculations accepted by Jewish authorities. For extremely precise calculations (especially around sunset), consult a rabbi or use specialized halachic software.
Disclaimer
Note: This calculator provides accurate Hebrew date conversions based on standard algorithms. For religious purposes, especially regarding sunset times and halachic considerations, please consult with a qualified rabbi.