Dates & durations
Exact Date Difference Calculator
Break a date interval into calendar years, months and days.
Open tool →Dates & durations
Countdown to a Date
Follow the time remaining until an event, with your chosen time and time zone.
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
The time zone is either UTC or this device’s local zone. If the time is unknown, midnight is used. Local daylight saving changes affect timestamp durations; leap seconds are not included. A chosen reference date is evaluated at midnight.
See a worked example
Illustrative example, as of September 13, 2026.
- Event date
- 2030-01-01
- Birth or event time
- 00:00
- Counter time zone
- UTC
1,205 d · 12:00:00
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.