Date Difference Calculator
Calendars count days differently from people. Get the exact number, including the start-day convention.
The start-day convention
A 30-day notice from 1 March can end on 30 or 31 March depending on whether day one counts. Contracts should say which.
Working days
Monday to Friday, ignoring holidays. For payroll or court deadlines, use the official holiday list.
Are leap years handled?
Yes — real calendar dates, so 29 February counts when it falls inside the range.
Can I count backwards?
Yes — put the later date in “From” and the result is negative.