World clock & time zones.
An accurate live clock, a time-zone converter, and the current time in cities worldwide.
Convert a time between zones
Around the world right now
Accurate, not just your device clock
Computer and phone clocks drift, and a meeting invite is only as good as the time it's based on. This clock syncs to a network time source when the page loads and applies the correction, so the seconds you see are close to true UTC rather than whatever your device thinks. The converter handles the other half of the problem — working out what 9am in New York is in London or Tokyo — which is where most cross-border scheduling goes wrong. Times update live as the seconds tick. For converting other units, see the unit converter.
Scheduling a call across time zones
Pick one zone as your anchor and convert outward. Say you're in New York (UTC−4 in summer) and want a call at 3:00pm your time: London is UTC+1, so add five hours to get 8:00pm there, and Tokyo is UTC+9, making it 4:00am the next day — usually a sign to shift earlier. The reliable habit is to state times in UTC or name the zone explicitly ("3pm ET"), never just "3pm," which is ambiguous the moment two zones are involved.
Watch daylight saving. Offsets aren't fixed: New York moves between UTC−5 and UTC−4, and the US, UK, EU, and Australia all switch on different dates, so the gap between two cities can change by an hour for a week or two each spring and autumn. Because the converter reads each zone's current rules, it applies the right offset automatically instead of relying on a memorized number.