What date will it be in 90 days?

Enter today's date, select "Add days" and enter 90. The date is displayed instantly.

How do I calculate an end-of-notice date?

Enter the notice start date and add the duration in days (30, 60 or 90 depending on your contract).

How do I find a past date?

Select "Subtract days", enter today's date and the number of days to subtract.

Does the calculation account for leap years?

Yes, leap years and variable-length months are automatically taken into account.

Add Days to a Date — Date Calculator

How to add days to a date?

Adding or subtracting days from a date is a common calculation: cooling-off periods (14 days), notice periods (1 to 3 months), expected due dates (280 days), payment deadlines (30, 60 or 90 days). Our tool gives you the result instantly.

To use it, enter a starting date, choose whether to add or subtract days, then enter the number of days. The resulting date is displayed immediately along with the day of the week.

The calculation takes leap years and variable-length months into account. Whether you add 30 days or 3,000 days, the result is always accurate. You can copy the resulting date with one click.

Frequently asked questions

Enter today's date as the starting date, select "Add days" and enter 90. The resulting date is displayed instantly along with the day of the week.

Enter the notice start date, select "Add days" and enter the duration in days (e.g. 30, 60 or 90 days depending on your contract). For a notice period in months, convert to approximate days first.

Select "Subtract days" mode. For example, to find what date was 100 days ago, enter today's date and subtract 100 days.

Yes, our tool automatically accounts for leap years (366 days instead of 365) and variable-length months. The calculation is always accurate.

Add or subtract days

How to add days to a date?

Frequently asked questions