Birthdays
Next Birthday Countdown
Find the date, weekday and days until your next birthday.
Open tool →Birthdays
Days Since Your Last Birthday
Count the days since your last birthday and your progress toward the next.
1
Your dates
On this deviceYour dates are remembered here for 30 days. No account needed.
2
Your story in numbers
Every date has a story.
Enter your dates to discover your result and the next dates worth keeping.
Understanding your result
Day milestones add that many days to the starting date. Annual anniversaries preserve month and day; February 29 is clamped to February 28 where needed, unless both conventions are explicitly compared.
See a worked example
Illustrative example, as of September 13, 2026.
- Date of birth
- 1991-05-16
120 days since your birthday
Are my dates sent to a server?
Calculations run in your browser. Your dates stay on this device unless you choose to include them in a sharing link or image. “Clear my dates” removes them from local storage.