DaysMath is a free set of date calculators that work the same way in every country: days between dates, adding and subtracting dates, business days, ages, countdowns and more.
How we keep it accurate
The rules behind every result are public on how we calculate, an automated test suite runs before every release, and corrections are logged with their date.
Your privacy
Calculations run in your browser and we do not store the dates you enter. See the privacy policy.
Contact
Questions, ideas or a result that looks wrong: get in touch.