📅 Date Calculator
Deadlines, notice periods and countdowns – count the days or find the date N days from now.
🔒 Runs in your browser · files never uploaded
Days between two dates
—Days
—Weeks + days
—Years, months, days
—Business days (Mon–Fri)
Add or subtract from a date
—Result
How to use the Date Calculator tool
- Pick a start and end date to see the days, weeks and business days between them.
- Tick "Include end date" if both days should count.
- Or use the second panel to add or subtract days, weeks, months or business days.
Frequently asked questions
Does "days between" include the start and end date?
By default it counts the end date but not the start (like subtracting dates): 1 Jan to 31 Dec 2024 is 365 days. Tick "Include end date" to count both, giving 366.
How are business days counted?
Monday to Friday are counted; weekends are skipped. Public holidays vary by country and are not excluded, so subtract any that apply.
What happens when I add a month to 31 January?
The result is clamped to the last day of the shorter month – 28 February (or 29 in leap years) – rather than spilling into March.