World Clock

Yes. This world clock never stores fixed offsets. It reads the live time for each city from your browser's built-in IANA time zone database, which already knows every country's daylight saving rules and the exact dates they switch. So when a city springs forward or falls back, its clock here updates on its own — you never have to adjust anything.

The offset badge is worked out in minutes, not whole hours, by comparing each city's wall-clock time with yours. That means half-hour and quarter-hour zones such as India (+5:30), Nepal (+5:45), Iran (+3:30) and parts of Australia (+9:30) are shown exactly, instead of being rounded to the nearest hour like some clocks do.

Yes, inside your own browser. The cities you add and your 12- or 24-hour choice are stored locally with localStorage on your device, so they are still there on your next visit. Nothing is uploaded to a server and no account is needed. In private browsing the list simply resets when you close the tab.

Every clock is calculated from your device's own clock and then shifted into each city's time zone, so the world clock is exactly as accurate as your computer or phone. If a city looks off by a few minutes, check that your device is set to update its clock automatically over the network.

The label under each city tells you whether that city is on a different calendar day from you right now — handy when you book a call across time zones. If a teammate's city shows Tomorrow, a 9 a.m. slot for you may already be their next evening, so you can pick a time that is daytime for everyone using the sun and moon icons.