An accurate live clock, a time-zone converter, and the current time in cities worldwide.
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.