Jewish Birthday Calculator

About This Tool

So you want to know when your birthday falls on the Jewish calendar? Or maybe you’re trying to figure out when your kid’s bar mitzvah should be? Yeah, it’s not as simple as just looking at a Gregorian calendar. The Jewish calendar is lunar-based, which means dates shift every year. That’s where this Jewish Birthday Calculator comes in—no fancy apps, no subscriptions. Just a straightforward way to convert your regular birthday into the Hebrew date, and vice versa.

I built this because I kept getting confused every time someone asked, “When is your Hebrew birthday?” Spoiler: It’s not the same day every year. This tool does the math so you don’t have to. Whether you’re planning a celebration, checking a milestone, or just curious, it’s here to help—without the fluff.

Key Features

• Converts any Gregorian date to its Hebrew calendar equivalent
• Works both ways—input a Hebrew date and get the Gregorian one
• Shows the Hebrew month and day in both English and Hebrew script
• Includes major Jewish holidays nearby so you know what’s going on that time of year
• No sign-up, no tracking—just enter the date and get the result
• Mobile-friendly, so you can use it on your phone during family dinners when someone inevitably asks

FAQ

Wait, why does my Hebrew birthday change every year?
Because the Jewish calendar follows the moon, not the sun. Months are about 29–30 days long, and they don’t line up neatly with January through December. So your Hebrew birthday—like 15 Shevat or 3 Kislev—will fall on different Gregorian dates each year. That’s just how it rolls.

Can I use this for figuring out when my kid becomes bar or bat mitzvah?
Absolutely. Just enter their Hebrew birth date, and the calculator will show you the Gregorian date when they turn 13. That’s the big one. You can plan the party, send the invites, and finally stop guessing.