Help and Example Use

• Some typical uses for the Date Calculators

API Services for Developers

• API for Business Date Calculators

Date Calculators

• Time and Date Duration – Calculate duration, with both date and time included
• Date Calculator – Add or subtract days, months, years
• Weekday Calculator – What day is this date?
• 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