Date & Time

Instant, private, and free

Date Calculator.

Add or subtract days, weeks, months from dates

On-device calculationNo signup
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Set your values

Results update as you type.

Calculation Mode

How to Use

Add/Subtract: Calculate a future or past date by adding or subtracting time

Difference: Find the time between two dates

All calculations account for different month lengths and leap years

FAQs

How do I add or subtract days from a date?

Select your starting date, choose Add or Subtract, enter the number of days, and click Calculate.

Does the date calculator account for leap years?

Yes, all leap year rules are handled accurately.