About tilwhen

tilwhen makes date math instant. Whether you need to know how many days until a holiday, what date falls a certain number of days from today, the gap between two dates, or your exact age — you get a clear answer at the top of the page, computed in your local timezone.

Every tool runs entirely in your browser. Nothing you type is sent to a server, and we don't require an account.

How we count

We count whole calendar days from midnight to midnight in your local timezone. For countdowns, today is day 0 (not counted), matching the everyday meaning of "days until." Business-day figures count Monday–Friday only and do not exclude public holidays.

Contact

Questions or corrections? See our contact page.