Date Add & Subtract Calculator
Add or subtract days, weeks, months or years. Find the resulting date and weekday privately in your browser.
Processed locally in your browserPrivate by design. Dates stay in this browser and are not saved.
Use a negative number to subtract. Month/year changes clamp to the last valid day. Weekends and holidays are included.
Choose your dates to see results instantly.
How to use Date Add & Subtract Calculator
- Enter the requested dates or year.
- Adjust optional settings and read the local result.
Useful things to know
Gregorian dates, years 1–9999. Month/year additions clamp to the last valid day. Weekends and holidays are not skipped.
Is Date Add & Subtract Calculator free, and how is my privacy handled?
Yes. Date Add & Subtract Calculator is free to use without registration. Tool inputs are processed in your browser rather than uploaded to our servers. Optional usage analytics follows your cookie preferences; it does not receive your files or tool inputs. Keep your browser updated and review results before sharing.