Date Calculator
Free online tool to calculate days between two dates, add/subtract days, and count down to festivals.
How to Use
- Days between dates
Choose the Difference tab, pick a start and end date, then click Calculate to get the number of days, weeks and estimated months.
- Add / subtract days
Choose the Add/Subtract tab, enter a start date and days (positive forward, negative backward). The result shows the target weekday.
- Countdown to a date
Choose the Countdown tab and enter a target date to see how many days remain from today.
FAQ
How to calculate date difference?
Pick two dates and click Calculate. The tool counts calendar days between them (excluding the start date, including the end date).
How to add or subtract days?
Enter a start date and the number of days to add or subtract (negative goes backwards) to get the target date.
Is the result accurate?
The calculation uses the Gregorian calendar and supports leap years and year boundaries.