What Day Was I Born?
Find the weekday you were born, how many days you've been alive, your generation, birthstone and zodiac signs.
About the What Day Was I Born?
Enter a birth date to see the weekday you were born on, how many days, weeks and hours you've been alive, your next 10,000-day milestone, generation, birthstone and zodiac signs.
Enter your birth date to see facts about it. Days alive count from your birth date to today. Generations follow the Pew Research Center's widely used boundaries; birthstones follow the modern list of the American Gem Trade Association; the zodiac sign uses the Sun's actual position, and the Chinese zodiac uses that year's Lunar New Year date.
The formula
Days alive = today − birth date; weekday from the Gregorian calendar
Worked example
Example: You were born on a = Thursday
- Inputs: Date of birth: 28 February 1985; Today: 1 January 2026.
- Formula: Days alive = today − birth date; weekday from the Gregorian calendar
- Result: You were born on a = Thursday
- Days alive: 14,917
- Weeks alive: 2,131
- Hours alive (approx.): 358,008
Questions people ask
What day was I born?
The headline shows the weekday.
When is my 10,000th day?
About 27 years and 4 months after birth; the exact date is in the results.
How old am I in days?
Shown as “Days alive”: today's date minus your birth date.