Add or Subtract Days From Date

Add or subtract days, weeks or months to any date to find the new date.

How to use this tool

Choose the starting date (default today).
Enter the offset: days, weeks and/or months.
Toggle business-days-only if needed.
See the resulting date and weekday.

How it works

The offset is applied via calendar arithmetic with month clamping for short months; in business mode only working days are counted.

Tips

Use business days for vendor and HR deadlines.
Contract dates usually count calendar days — confirm the convention.

Limitations

Public holidays aren't factored into business days (only weekends).

Frequently asked questions

What date is 90 days from today?

Enter today's date, add 90 days, and the calculator returns the exact date and weekday.

Does subtracting months handle short months?

Calendar clamping is applied — e.g. Jan 31 minus 1 month becomes Dec 31.

Can it leap over weekends only?

A 'business days only' toggle skips Saturdays and Sundays.