Date Calculator
What date is 90 days from today? Add or subtract any amount of time from a date.
Years and months are added first as calendar months. Public holidays are not excluded.
Frequently asked questions
How do I find the date 90 days from today?
Leave the start date as today, set Days to 90 and choose Add. The result shows the exact date and the weekday it falls on. Use Subtract to find a date in the past instead.
What happens when I add a month to the 31st?
If the target month is shorter, the result stops at its last day. Adding one month to 31 January gives 28 February (29 in a leap year), the same way calendars and most legal and banking rules treat it.
How does the working-days option work?
With it ticked, the weeks and days you enter are counted as Monday-to-Friday days, skipping Saturdays and Sundays, and each week counts as five working days. Public holidays are not excluded because they differ by country and state, so subtract them yourself if they matter.
Does it handle leap years and daylight saving?
Yes. Dates are calculated as calendar days, so leap days are counted correctly and clock changes never shift the answer by a day.