Date Difference Calculator
Days between two dates, with or without weekends.
Contracts and notice periods usually count inclusively; everyday usage does not.
Duration
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Business days exclude Saturdays and Sundays only. Public holidays vary by region, so subtract those yourself.
How the Date Difference Calculator works
Counts the gap between two dates in every useful unit at once, and separately counts business days by excluding Saturdays and Sundays — the figure you need for delivery windows, notice periods, and project deadlines.
Frequently asked questions
Should the end date be included in the count?
By default this calculator counts the gap between the dates, so 1 March to 3 March is 2 days. Contracts and notice periods often count inclusively, making it 3 days. Toggle 'include end date' to switch, and check which convention your situation uses.
How are business days counted?
Every day that is not a Saturday or Sunday within the range. Public holidays are not deducted because they vary by country and region, so subtract them manually for an exact working-day figure.
Why are months and days shown separately?
Because months have unequal lengths, a duration like '90 days' is not cleanly '3 months'. The years-months-days breakdown follows the calendar, while the total-days figure is the exact count.
Does this handle dates before 1970 or far in the future?
Yes. The calculation uses the proleptic Gregorian calendar, so historical and future dates both work. Note that dates before the Gregorian reform of 1582 will not match contemporary historical records.