Help and Example Use
API Services for Developers
Date Calculators
- Duration Between Two Dates– Calculates number of days
- Time and Date Duration– Calculate duration, with both date and time included
- Date Calculator– Add or subtract days, months, years
- Birthday Calculator– Find when you are 1 billion seconds old
- Week Number Calculator– Find the week number for any date
Related Links
- Calendar & Holidays Overview– Explore calendar tools
- Calendar Generator– Create a calendar for any year
- The World Clock– Current time all over the world
- Countdown to Any Date– Create your own countdown