Jewish Birthday Calculator

The Hebrew calendar is a lunisolar calendar that has been used in Jewish tradition for thousands of years to mark religious observances, lifecycle milestones, and cultural celebrations. Because the Hebrew calendar does not align with the Gregorian calendar most of the world uses today, a birthday that falls on a specific date in one system corresponds to a different date in the other — and that date shifts from year to year.

Our Jewish Birthday Calculator converts your Gregorian birthdate into its Hebrew calendar equivalent instantly. Enter your date of birth and the tool returns your Jewish birthday displayed in both English transliteration and Hebrew script, giving you the date you need to observe, celebrate, or plan around Jewish milestones with accuracy and confidence.

Why Your Hebrew Birthday Matters

In Jewish tradition, the Hebrew birthday carries significant religious and cultural weight that goes beyond a simple calendar conversion. A person’s Hebrew birthday is considered the most spiritually auspicious day of the year for that individual — a day of personal significance tied to the cycle of the Jewish lunar calendar.

Several important lifecycle milestones are calculated and observed according to the Hebrew date rather than the Gregorian one. A Bar Mitzvah for a boy and a Bat Mitzvah for a girl are traditionally observed on the Shabbat on or after their thirteenth Hebrew birthday. Yahrzeit — the annual observance commemorating the anniversary of a loved one’s passing — is also observed according to the Hebrew date of death. Knowing your Hebrew birthdate is therefore not just culturally interesting but practically necessary for observing these traditions correctly.

The Hebrew Calendar Explained

The Hebrew calendar is based on a 19-year cycle that combines lunar months with periodic adjustments to keep it aligned with the solar year. A standard Hebrew year contains 12 months, while a leap year — which occurs seven times in every 19-year cycle — contains 13 months with the addition of a second month of Adar. Hebrew months begin at the new moon and are either 29 or 30 days long.

Because the Hebrew year and the Gregorian year are not the same length and do not begin on the same day, any given Hebrew date will fall on a different Gregorian date each year. This is why Hebrew birthdays and anniversaries cannot simply be observed on the same Gregorian date annually — the Hebrew date must be looked up each time to find the correct Gregorian equivalent for that year.

Who Should Use This Calculator

Jewish Individuals and Families

Find your own Hebrew birthday and those of family members to observe personal milestones, plan celebrations, and deepen your connection to Jewish tradition and heritage.

Parents Planning a Bar or Bat Mitzvah

Calculate your child’s thirteenth Hebrew birthday accurately to plan the timing of their Bar or Bat Mitzvah celebration well in advance.

Those Observing Yahrzeit

Convert the Hebrew date of a loved one’s passing to find the correct Gregorian date for Yahrzeit observance in any given year.

Genealogists and Researchers

When working with historical Jewish records, converting between Hebrew and Gregorian dates is an essential step in building accurate family histories and timelines.

Anyone Exploring Jewish Culture and Heritage

Whether you are Jewish by birth, by conversion, or simply curious about Hebrew calendar traditions, this tool makes it easy to explore your connection to the Jewish calendar.

How to Use the Jewish Birthday Calculator

Getting your result takes just a moment. Follow these simple steps.

Step 1: Enter Your Birthdate

Use the date picker to input your Gregorian date of birth. Select the day, month, and year from the calendar interface.

Step 2: Click Calculate

The calculator processes your Gregorian date and converts it to the corresponding Hebrew date using the Hebrew calendar algorithm.

Step 3: View Your Results

Your Jewish birthday is displayed in both English — for example, “25 Tishrei 5784” — and in Hebrew script, giving you the full bilingual result for use in any context.

Step 4: Apply the Results

Use your Hebrew birthdate to plan or schedule Jewish lifecycle events such as Bar or Bat Mitzvahs, Yahrzeit observances, or personal spiritual milestones with accurate, calendar-based precision.

The Twelve Months of the Hebrew Calendar

The Hebrew calendar follows a fixed sequence of months, each carrying its own character and associated holidays or observances.

Tishrei

The first month of the Hebrew year, Tishrei is one of the most spiritually significant months in the Jewish calendar. It contains Rosh Hashanah (the Jewish New Year), Yom Kippur (the Day of Atonement), and Sukkot (the Feast of Tabernacles).

Cheshvan

The second month, sometimes called Marcheshvan, is notably free of major holidays — a quiet month following the intensity of Tishrei.

Kislev

The third month, home to Hanukkah — the Festival of Lights — which begins on the 25th of Kislev and continues for eight nights.

Tevet

The fourth month, during which Hanukkah typically concludes. The 10th of Tevet is observed as a fast day commemorating the siege of Jerusalem.

Shevat

The fifth month, which includes Tu BiShvat — the New Year for Trees — observed on the 15th of Shevat.

Adar (and Adar II in leap years)

The sixth month, home to Purim on the 14th of Adar — one of the most joyful celebrations in the Jewish calendar. In leap years, a second month of Adar is added and Purim is observed in Adar II.

Nisan

The seventh month by counting but considered the first month of the religious year. Passover begins on the 15th of Nisan, commemorating the Exodus from Egypt.

Iyar

The eighth month, which includes Lag BaOmer and Yom Ha’atzmaut (Israeli Independence Day).

Sivan

The ninth month, home to Shavuot on the 6th of Sivan — the Feast of Weeks, marking the giving of the Torah at Mount Sinai.

Tammuz

The tenth month, which begins a period of mourning culminating in the fast of the 17th of Tammuz.

Av

The eleventh month, which includes Tisha B’Av — the ninth of Av — one of the most solemn fast days in the Jewish calendar, commemorating the destruction of the First and Second Temples.

Elul

The twelfth and final month, a time of reflection and spiritual preparation leading into the High Holy Days of Tishrei.

Why This Calculator Stands Out

Converting between the Hebrew and Gregorian calendars involves a complex algorithm that accounts for leap years, varying month lengths, and the lunisolar structure of the Hebrew system. This calculator handles all of that automatically, returning an accurate bilingual result in seconds without requiring any calendar knowledge on your part. It’s free, works on any device, and requires no registration — making it the easiest and most accessible way to find your Hebrew birthday online.