What is a Date Difference Calculator?
Project timelines, notice periods, interest windows, visa stays — all come down to “how many days between these dates”, and often specifically working days.
Pick two dates for calendar days, Monday–Friday weekdays, and full weeks. Counts are exclusive of the end date, the convention most contracts use.
How to use the Date Difference Calculator
- Pick the start date.
- Pick the end date.
- Read calendar days, weekdays and weeks.
Frequently asked questions
Is the end date included?
No — Monday to Friday counts 4 days. Add 1 if your context counts both endpoints.
Are public holidays excluded from weekdays?
No — holidays vary by country and state; subtract yours from the weekday count.
Can dates be in reverse order?
Yes — the difference is shown as a positive count either way.
Does it handle month/leap-year boundaries?
Yes — real calendar arithmetic throughout.