Free tool
A live equirectangular world map colored by current UTC offset. Click any mapped region to inspect its IANA time zone, local clock, and curated city matches.
UTC offsets are the difference between a local civil clock and Coordinated Universal Time. A place labeled UTC+02:00 is two hours ahead of UTC at this instant, while UTC-05:00 is five hours behind. The map above uses the current IANA time zone rules, so countries affected by daylight saving time can change color when their seasonal offset changes. That makes it more useful than a static time zone poster: London, New York, or Sydney may not keep the same relationship all year.
The polygons are deliberately simplified so the tool stays fast and readable on small screens. Each region is assigned one representative IANA zone, which is enough for a quick offset overview but not a substitute for city-level scheduling in countries with multiple zones. The side panel lists curated cities that match the selected zone exactly, helping you move from a visual map to a practical meeting or publishing decision.
Use the cooler blue regions to spot time zones west of UTC and the warmer orange regions to spot zones east of UTC. Gray marks UTC itself. For exact conversions across multiple cities, use the time zone converter after you identify the regions you care about.