Time Zone Converter

Pick a source time zone (UTC-12 to UTC+14, with the half-hour zone for India at UTC+5:30 included), set the time you want to convert, then pick the destination zone. The converter handles the wraparound across the date line: if it is 9pm Tuesday in London (UTC+0) and you convert to Sydney (UTC+10), it shows 7am Wednesday. UTC-5 (New York) when it is 6pm London is 1pm; UTC-8 (Los Angeles) is 10am the same day. UTC+9 Tokyo when it is 6pm London is 3am the next morning.

Note that this is UTC offsets, not country names. Most countries that use Daylight Saving Time shift their offset by one hour twice a year - London moves between UTC+0 (winter) and UTC+1 (summer, BST), New York between UTC-5 (EST) and UTC-4 (EDT), Sydney between UTC+10 and UTC+11. If you are scheduling a meeting across DST boundaries, check both ends a week before the call - DST start dates differ between Europe (last Sunday of March) and the US (second Sunday of March), so for two weeks in March there is an extra hour gap that catches everyone out.

Three real-world cases where the maths bites. First: scheduling a Zoom call. London 4pm with a New York colleague is 11am their time - manageable. London 4pm with a Singapore colleague is 11pm their time - they should not be expected to take it. London 4pm with Sydney is 3am the next morning - genuinely cruel without a strong reason. The 8am-7pm civilised window in Singapore is midnight to 11am in London; for Sydney it is 9pm previous evening to 8am London time.

Second: catching live sport or live TV. The 2026 World Cup final in Mexico City kicks off in local UTC-6, so for UK viewers (UTC+0 in November) that is 6 hours ahead. Third: scheduling a flight arrival or pickup. Tokyo lands at 3pm local; if you booked a hotel airport transfer, confirm the local time, not your home time, or you will sit at Narita for 9 hours. The [World Clock](/world-clock) lets you watch multiple zones live; this converter is for one-off calculations.

About 70 countries use DST, but the dates differ. EU: last Sunday of March (clocks forward) and last Sunday of October (back). US and Canada: second Sunday of March and first Sunday of November. Australia: first Sunday of October (forward, in southern states only) and first Sunday of April (back). Most of Africa, Asia and South America do not use DST at all. For two weeks in March every year, the US is on Daylight Time but Europe is not, so the London-New York gap drops from 5 hours to 4. Then Europe catches up in late March and the gap goes back to 5.

Iceland, Russia, Argentina, India, China, Japan, South Korea and most of the Middle East do not observe DST. The EU has voted twice to abolish DST and twice failed to implement it; as of 2026 no abolition is scheduled. If you are setting recurring meetings across multiple zones, set them in UTC and let each participant interpret locally - that avoids the twice-yearly drift entirely.

London to New York: -5 hours winter, -4 hours summer (EST/EDT). London to Los Angeles: -8/-7. London to Tokyo: +9 always. London to Sydney: +10 winter for both, +11 in UK winter / Australian summer (Oct-March), back to +10 in March-October when Australia drops back. London to Mumbai: +5:30 always. London to Singapore: +8 always. London to Dubai: +4 always. New York to Los Angeles: -3 hours always (both observe DST in sync).

The half-hour zones catch people out: India UTC+5:30, Iran UTC+3:30, Afghanistan UTC+4:30, Newfoundland UTC-3:30 (and shifts to -2:30 in summer). Nepal is UTC+5:45, the only quarter-hour zone. Chatham Islands in New Zealand are UTC+12:45. These are not numerical errors; they reflect historic civil time decisions tied to local solar noon. The converter handles all 39 zones currently in use.