Everyday
Date Difference Calculator
Pick two dates and instantly see the gap in days, weeks, months and business days.
How it works
Calendar days = absolute difference in milliseconds ÷ 86,400,000. Business days are counted by iterating each day and excluding Saturdays and Sundays. UK bank holidays are not automatically excluded — subtract them manually if needed.
Frequently asked questions
Does this exclude UK bank holidays?
Not automatically. The business day count excludes only weekends. Subtract the number of bank holidays in your date range manually.
Can I use this to calculate notice periods?
Yes — enter your resignation date as the start and your proposed last day as the end to confirm the number of calendar or working days in your notice period.