About date-calculator.info

date-calculator.info is a free collection of date and time calculators — days between dates, age, business days, countdowns, and more — built to give a fast, accurate answer to a specific date question without clutter, sign-ups, or unnecessary steps.

Why we built this

Most date calculation questions are simple in principle but easy to get wrong by hand: variable month lengths, leap years, the difference between calendar days and business days, and month-end edge cases all introduce room for error. Every calculator on this site runs on the same calendar-aware engine, designed to handle these cases correctly and consistently every time.

How the calculations work

All calculations run locally in your browser using JavaScript — nothing you enter into a calculator is sent to a server or stored. Every tool uses the Gregorian calendar, the civil calendar standard used for legal, business, and administrative purposes in nearly every country. See our Gregorian calendar guide for more on how that system works.

Who runs this site

date-calculator.info is operated by MX3 TRADE LLC, 254 Chapman Road, Ste 209, Newark, DE 19702, United States. The site's publisher is Michael Mitchell.

Questions or feedback

If you spot something that looks wrong, or have a suggestion for a calculator we're missing, we'd like to hear about it — see our Contact page for how to reach us.