Exact time between two dates, including weekdays only.
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Uses of date difference
- Counting the days remaining until a deadline or event.
- Measuring a project length in weeks and business days.
- Working out how long ago a past date was in exact calendar terms.
date difference pitfalls
- Approximating a month as 30 days instead of borrowing the real length of the preceding month.
- Counting calendar days when a task actually needs business days, which exclude weekends.
- Assuming the difference changes if you swap the start and end dates.
date difference questions (4)
How many days are between two dates?
Enter a start date and an end date, and the tool reports the whole number of days between them, along with the same gap expressed in weeks and in years, months, and days. The count is exact: it steps through the calendar and accounts for leap years and each month’s real length.
How many weekdays are between two dates?
The result includes a weekday count, sometimes called business days, which is the number of Monday-to-Friday days in the range. It is worked out by counting whole weeks and then checking the leftover days one by one, so weekends are excluded. Public holidays are not removed, since those vary by country.
How many weeks and months is that span?
Total weeks is the number of complete seven-day weeks in the range. The years-months-days breakdown is the same gap shown the way people usually say it, for example "6 months and 7 days". Both describe the identical span, just in different units.
Does the order of the dates matter?
No. The calculator measures the length of the span whichever way round you enter the dates, so a start after the end gives the same duration. It notes when the dates are reversed so you can double-check the direction if it matters for your use.