The current time in cities around the world, side by side with yours, with UTC offsets and how far ahead or behind each one is.
| Detected zone | – |
| UTC offset now | – |
| Cities shown | – |
Cards are ordered from furthest behind you to furthest ahead. An orange day marker means that city is on a different calendar day from you.
This world clock shows the current time in a dozen major cities at once, updated every second, alongside your own local time. Each card shows the city, the time in 12- or 24-hour format, the date (which may differ from yours), the current UTC offset, the zone abbreviation, and how many hours that city is ahead of or behind you right now. Add any of about 60 cities from the list, remove the ones you do not need, and the selection is kept in the page address so you can bookmark your own set or send it to a colleague. It is useful for scheduling across offices, calling family abroad, following markets, or watching a launch or match in another country.
Every second the page takes the current instant from your device clock and formats it for each selected IANA time zone (for example America/New_York) using the browser's built-in Intl.DateTimeFormat with the timeZone option. The UTC offset for a zone is derived by formatting the instant as year, month, day, hour, minute, and second in that zone, reassembling those parts as if they were UTC, and subtracting the real instant; the difference in minutes is the offset, including any daylight-saving shift in force at that moment. The hours-ahead figure is simply that zone's offset minus your local offset. No offsets are hard-coded, so daylight-saving changes are handled by the browser's own time zone database.
When a city is far enough ahead or behind you, its local clock has already passed midnight or not yet reached it. Sydney, for example, is typically 14 to 16 hours ahead of New York, so in the New York evening it is already the next morning in Sydney. Each card shows the weekday and date for that city so the day difference is explicit.
Yes. Offsets come from the browser's time zone database for the current instant, so cities switch automatically on their own changeover dates. Because different regions change on different dates (the US in March and November, Europe in late March and late October, Australia in April and October), the gap between two cities can vary by an hour during a few weeks each year.
They are the short names the browser provides for each zone at the current instant: EST is Eastern Standard Time, EDT its daylight version, BST British Summer Time, and so on. For zones without a common English abbreviation the browser shows the offset instead, such as GMT+5:30 for India. The numeric UTC offset on each card is the unambiguous value.
It is exactly as accurate as your device clock, because the page reads the system time and formats it for each zone; nothing is fetched from the internet. Most phones and computers synchronize to a time server automatically and are within a second. If a clock looks wrong for every city by the same amount, check your device's date and time settings.
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