What Day Was I Born? Birthday Facts Calculator
Enter your birthday to find the weekday you were born and fun facts to share.
How to use: Pick your date of birth. You instantly see the weekday, days and hours alive, your next birthday and your signs, ready to share.
How to use the What Day Was I Born?
Enter your date of birth. The calculator uses the Gregorian calendar to tell you the day of the week you were born, then counts the days, weeks and hours you have been alive up to today. It also estimates your heartbeats at an average of 70 per minute, just for fun.
Next it shows the date and weekday of your next birthday, how many days are left and the age you will turn. Finally you get your Western star sign, your Chinese zodiac animal, your birthstone and your generation, such as Millennial or Gen Z.
Worked example: born on 15 August 1995, which was a Tuesday. On 7 October 2026 that person has lived 11,376 days (1,625 weeks), will turn 32 on Sunday 15 August 2027 in 312 days, is a Leo, a Pig in the Chinese zodiac, has peridot as a birthstone and is a Millennial.
Tap Copy or Share on WhatsApp to send a fun fact to friends, and challenge them to find their own. Your date of birth is used only inside your browser and is never saved or uploaded. For your exact age in years, months and days, use the age calculator.
Frequently asked questions
How is the weekday calculated?
From the Gregorian calendar in your browser, which is accurate for any date after 1582.
Why might my Chinese zodiac be different?
The Chinese year starts at Lunar New Year (late January to mid-February). If you were born before it, you belong to the previous animal.
Is my birthday stored?
No. Everything is calculated on your device and nothing is saved.
How accurate is the heartbeat number?
It is a rough estimate based on 70 beats per minute; real heart rates vary.