Baby & child
Baby Age in Months and Weeks
See your baby’s calendar age, complete weeks and days lived.
Open tool →Baby & child
Child Monthly Milestone Calendar
See upcoming monthly anniversaries from birth, without developmental or medical benchmarks.
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
- 2025-11-16
The next 12 dates
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.