Select both dates above to calculate the difference.
Common Uses
- Find how many days until a deadline, event, or holiday.
- Calculate how long ago something happened.
- Count the days between two contract or project dates.
- Add a 90-day warranty or return window to a purchase date.
- Find what date falls N days from today.
Frequently Asked Questions
Does it count the start and end date?
The difference calculator counts the total days from start date to end date (exclusive of the start, inclusive of the end). This matches how most "days remaining" or "days elapsed" calculations work.
Are leap years accounted for?
Yes. The calculator uses JavaScript's native Date object, which correctly handles leap years, varying month lengths, and daylight saving time changes.