About timezonecompare.com

timezonecompare.com shows time differences, local times and time zones for cities and countries around the world. Every time on the site is computed live in your browser for the moment you open the page, never looked up in a static table that quietly goes stale.

Why it's accurate

Time-zone sites tend to fail exactly when accuracy matters most: in the weeks around daylight saving transitions, when two places switch on different dates and the difference between them is temporarily an hour off its usual value. We avoid that by never hardcoding offsets. Each time is derived from the IANA Time Zone Database, the same authoritative source operating systems and phones use, evaluated live via the browser's built-in Intl API. That makes the answer correct in midsummer, midwinter and the transition weeks in between.

Who is behind it

timezonecompare.com is built, written and operated by Nicolai Lykke, an independent developer working as Black Falcon Data. It is the English sister site of tidsforskel.dk, the Danish site built on the same engine. Every guide on the site carries his name; how they are researched, checked and corrected is set out on the editorial standards page. You can read exactly how the numbers are computed, and which open data sources they build on, on the data sources & method page.

Found a mistake?

We fix things. If a time, a city or a difference looks wrong, tell us which place it concerns via the contact page, concrete error reports make the site better for everyone.