Question 1

How do I count days between two dates?

Accepted Answer

Enter the start date and end date, then click Calculate. The tool returns the exact number of days, weeks, months and years, and counts business days if needed.

Question 2

Does this calculator count the end date?

Accepted Answer

By default the count is end-date minus start-date (so the end date is not counted as a full day). You can flip the inclusive checkbox to include both endpoints.

Question 3

Are leap years handled correctly?

Accepted Answer

Yes. The tool uses the actual calendar with leap years (Feb 29) handled correctly. For example, 2020 has 366 days and Feb 29 counts as 1 day.

Question 4

Can I add or subtract days from a date?

Accepted Answer

Yes. Switch to the Add/Subtract tab, enter a start date and a number of days, weeks, months or years, then click Add or Subtract to compute the new date.