Time & Date
View the current time across major cities and time zones around the world.
Times update every second. Default time zones are always shown. Add custom zones using the select menu above. All calculations happen in your browser.
A world clock is a real-time display tool that shows the current time in different cities, regions, or time zones at the same instant. Unlike a regular clock that shows only your local time, a world clock aggregates time data from multiple zones (UTC+/-X offsets) and updates continuously, eliminating confusion about whether it's 3 AM or 3 PM in Tokyo when you're calling from New York.
The tool uses your device's system time as a reference point (usually synced to atomic clocks via the internet) and applies a fixed offset for each selected time zone. Each zone has a set difference from Coordinated Universal Time (UTC)—for example, New York is UTC−5 (EST) and London is UTC+0 (GMT)—so the tool adds or subtracts hours and minutes from the current UTC time to show the local time in each location. Many world clocks also account for daylight saving time, automatically adjusting offsets during summer months in regions that observe DST.
| Input | Result | Notes |
|---|---|---|
| UTC time is 14:00 (2 PM); you select New York (UTC−5) and Tokyo (UTC+9) | New York: 09:00 (9 AM); Tokyo: 23:00 (11 PM) | Subtract 5 hours for New York, add 9 hours for Tokyo from the UTC reference |
| It's 18:30 in London (UTC+0, no DST); you check Dubai (UTC+4) and Sydney (UTC+10, DST active) | Dubai: 22:30; Sydney: 04:30 (next day) | Dubai is always +4 hours ahead; Sydney's offset includes daylight saving adjustment |
| You're scheduling a 9 AM call in Los Angeles (UTC−7); you want to know the time in Singapore (UTC+8) | Singapore: 00:00 (midnight, same day) | 15-hour time difference means the Singapore team joins late evening the previous day |
UTC (Coordinated Universal Time) is a global standard based on atomic clocks, stable and consistent worldwide. Time zones are defined as offsets from UTC (e.g. UTC+0, UTC−8) so any two zones can be compared mathematically without ambiguity.
Most modern world clocks do, but you should verify. Check your tool's settings or hover over a zone to see if 'DST active' or a note appears. During DST transitions (spring forward, fall back), offsets shift by 1 hour in affected regions.
Their phone's clock may be set manually to an incorrect time. A world clock pulls from internet-synced atomic time (NTP), so it is accurate; your friend should check their device settings.
Yes. Enter each time zone, then pick a start time that works for the earliest and latest zones. A world clock makes it easy to see which hours overlap across all five locations—often a narrow window.
Most world clocks let you enter a custom date and time instead of using the current time. Set your target datetime, and the tool will calculate what time it was or will be in every zone at that exact moment.
Yes. Nepal uses UTC+5:45, Australia's Lord Howe Island uses UTC+10:30 (or UTC+11 during DST), and some Pacific islands use UTC+12:45 or UTC−9:30. A comprehensive world clock should list these edge cases.