Days Between Dates Calculator
Count the number of days between two dates, including weeks, months and business days (Monday to Friday).
Enter your values and press Calculate.
How to use the Days Between Dates calculator
Use this to count down to holidays, track project deadlines or work out notice periods. By default the start date is counted and the end date is not — pick “Include end date” to count both.
Formula
Dates are compared at midnight UTC, so daylight-saving changes never add or remove a day. Business days count Monday to Friday and do not exclude public holidays.
Frequently asked questions
How many days until Christmas?
Leave the start date as today and the end date as 25 December — the calculator opens with this countdown by default.
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