Time zone converter
Convert a date and time in one city to several other cities at once, with correct daylight saving time on both sides.
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Pick the city where the time is given, enter the date and time, and add the cities you want it in. Each result shows the local time, the date (with +1 or −1 day when the conversion crosses midnight), the UTC offset on that date and whether daylight saving time applies. UTC is always listed for reference.
The date matters because offsets change with DST. For example, 9:00 in New York is 13:00 in London on 10 March 2026 but 14:00 on 10 April 2026: the United States moves its clocks forward on 8 March 2026 and the United Kingdom on 29 March 2026. The converter reads the rules for the exact date from your browser's IANA time zone data.
On the night clocks change, some local times do not exist (02:30 on the spring-forward date in New York) and some happen twice (01:30 on the fall-back date). The converter tells you when this happens: a skipped time moves forward by the size of the gap, and a repeated time uses the first occurrence, the same rule as the JavaScript Temporal standard's "compatible" mode.
How to use it
- Search the source city and select it.
- Enter the date and time as shown in that city, or press Now.
- Add target cities with the second search box; remove any you do not need.
- Read or copy the converted times. The page address keeps your cities, date and time for sharing.
Frequently asked questions
Why is the difference between two cities not always the same?
Because the two places may change their clocks on different dates, or one may not use DST at all. Dubai is 9 hours ahead of New York in winter and 8 hours ahead in summer, and for a few weeks each spring and autumn the gap between New York and London is one hour shorter than usual.
What does "+1 day" mean?
The converted time falls on the next calendar day in that city. For example, 20:00 Friday in Los Angeles is 07:00 Saturday in Dubai.
What is the difference between GMT and UTC?
For everyday scheduling they are the same time. UTC is the modern atomic-clock standard; GMT is also the name of the UK's winter time zone, which is why London shows UTC±0 in winter and UTC+1 (BST) in summer.
Can I convert to a city that is not listed?
Choose a listed city in the same time zone. All cities in a country usually share one zone, but large countries such as the United States, Canada, Australia, Russia, Brazil and Indonesia have several.
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