About DateCalcs

DateCalcs is a free collection of date tools — days between dates, an age calculator, add/subtract days, and countdowns to every major holiday. No account, no app, no ads blocking the answer.

Why we built this

Date math is fiddly to do in your head and most calculator sites are cluttered with pop-ups. We wanted clean tools that give you the answer instantly and get out of the way.

How it works

The calculators run entirely in your browser using real calendar dates, so leap years and month lengths are always handled correctly. The holiday countdowns are computed from the true date of each holiday — including the ones that move each year, like Thanksgiving and Easter — and update automatically every day.