Date Calculator
Add days or hours to a date, or calculate the difference between two dates.
Date Calculator
Add days or hours to a date, or calculate the difference between two dates.
About the date calculator
Add time or compare moments
Use Add time to move a starting date and time forward or backward by days or hours. Use Difference between dates to compare two moments and see calendar days, calendar hours, working days, and working hours.
Weekend and custom exclusions
Working day and working hour totals are not based on a regional public holiday calendar. They only apply the Exclude weekends option and the custom excluded dates you enter.
Shareable URL and calendar view
The page keeps the current mode, dates, times, filters, and exclusions in the URL query, so you can reopen or share the same calculation. The calendar highlights the base, target, start, end, range, and excluded dates, and the result can be copied.
FAQ
Common questions and answers about this topic.
How do I calculate business days between two dates?
Switch to "Difference" mode, enter the start and end dates, then check "Exclude weekends". The result shows both total calendar days and working days with weekends removed.
Can I exclude holidays from the calculation?
Yes. Use the "Custom excluded dates" section to add specific dates like national holidays. These dates are skipped in both add-time and difference calculations, in addition to any weekend exclusion.
What is the difference between calendar days and working days?
Calendar days count every day including weekends and holidays. Working days exclude weekends and any custom excluded dates, giving you the actual number of business days in the range.
How do I subtract days from a date?
In "Add time" mode, click the "Backward" direction toggle. Enter your starting date and the number of days or hours to subtract. The result will show the date in the past.