World Clock / Time Zone Converter
Convert a date and time between time zones, and compare several at once.
What is the World Clock / Time Zone Converter?
This tool converts a date and time from one time zone into several others at once — useful for scheduling a call across regions, figuring out when a deadline lands for someone else, or just checking what time it is somewhere else right now.
Why this doesn't go stale like a hardcoded time zone table would
Time zone rules change more often than people expect — countries adjust daylight saving start/end dates, some abolish DST entirely, and offsets occasionally shift for political reasons. Rather than embedding a table of UTC offsets that would quietly become wrong after the next rule change, this tool uses your browser's own built-in time zone database (the same IANA database operating systems and browsers keep updated), so it reflects whatever the current rules actually are on your device.
A note on precision
Conversions are accurate for the vast majority of date/time combinations. Right at the exact moment of a daylight-saving transition (the one or two hours when a region's clocks jump forward or repeat an hour falling back), a small handful of times are inherently ambiguous or non-existent in the source zone — a limitation of civil time itself, not something a converter can fully resolve without you specifying which occurrence you mean.
How to use it
- Enter a date and time, and pick the time zone it's in (defaults to your device's own time zone).
- See it converted instantly into the time zones listed below — defaults to UTC plus a few common zones.
- Use "+ Add time zone" to add any zone from the full list, or remove ones you don't need.