How to use it
- Your own time zone is always at the top. Type a city or time zone name to add more; remove one with ×. Your list is saved in this browser.
- Each row shows the live time and date, the UTC offset, how far ahead or behind you it is, whether daylight saving time is in effect, and the date the clocks next go forward or back there.
- Tick 12-hour for AM/PM times.
Where the times come from
The page reads your device’s clock and converts it with your browser’s copy of the IANA time zone database, the record of every region’s offsets and daylight saving rules that operating systems and browsers share. A zone is on daylight saving time when its current offset is the larger of its January and July offsets; the next change is found by stepping forward hour by hour until the offset changes and then narrowing it down to the minute. Half-hour and 45-minute zones such as India (UTC+5:30) and Nepal (UTC+5:45) work like any other.
Browsers update their copy of the database with their own releases, so a recent rule change can lag. In the Chromium version we tested, Moldova (Chisinau) still followed its pre-2022 rule and showed its October 2026 change one hour earlier than the current database; every other zone agreed. If a government has just changed its clocks, check an official source.
What we tested
On October 15, 2026 we compared the page with Python’s time zone library (IANA tzdata 2026a) for all 400 zones Chromium lists that Python can load, at four moments across 2026: every UTC offset and every daylight-saving flag matched, and of the 130 zones with a clock change in the next 400 days, all but Chisinau had exactly the same date and minute. In Chromium on a 390 px screen, adding Kathmandu by search showed UTC+5:45 and the correct local time, and the list was still there after reloading. Chromium lists a few zones by older names (such as Asia/Calcutta), so the page shows their current city names (Kolkata).
Sources
Frequently Asked Questions
Built by Derek Giordano · Part of Ultimate Design Tools