Time zone converter

Pick two cities and a time to see what the clocks say in the other one. Daylight saving is worked out for the date you choose.

From

Time in LondonDate

In New York10:00 AMThu, Jan 15

Time difference: New York is 5h behind
Time zones: GMT → EST
Right now: …

Hours in London and New York on 2026-01-15
London	New York
	3:00 AM
	4:00 AM
	5:00 AM
	6:00 AM
	7:00 AM
	8:00 AM
	9:00 AM
	10:00 AM
	11:00 AM
	12:00 PM
	1:00 PM
	2:00 PM
	3:00 PM

How the converter works

Every city here comes with its time zone from the IANA database, the record of every country's clock changes that phones and computers use. When you enter a time, the converter finds the moment that time happens in the first city, then asks what the second city's clocks read at that same moment. That way daylight saving, half-hour offsets and the date line are all handled, rather than adding a fixed number of hours.

The table under the result lists the working day hour by hour, so you can see at a glance where a meeting or a call falls. Tap any hour to convert it.

Time zones of major cities

Offsets from UTC in January and July. Where the two differ, the city changes its clocks for summer.

City	January	July	Zone
Los Angeles	UTC−8	UTC−7	America/Los Angeles
New York	UTC−5	UTC−4	America/New York
São Paulo	UTC−3	UTC−3	America/Sao Paulo
London	UTC	UTC+1	Europe/London
Paris	UTC+1	UTC+2	Europe/Paris
Dubai	UTC+4	UTC+4	Asia/Dubai
New Delhi	UTC+5:30	UTC+5:30	Asia/Kolkata
Kathmandu	UTC+5:45	UTC+5:45	Asia/Kathmandu
Singapore	UTC+8	UTC+8	Asia/Singapore
Tokyo	UTC+9	UTC+9	Asia/Tokyo
Sydney	UTC+11	UTC+10	Australia/Sydney
Auckland	UTC+13	UTC+12	Pacific/Auckland

Abbreviations like EST and EDT change with the season, which is why the table uses UTC offsets.

Tips for working across time zones

Say the time zone with the time, and give the city rather than an abbreviation: “3 PM London time” is clearer than “3 PM GMT”, which is wrong half the year.
Watch the weeks around daylight saving. Europe and North America change on different Sundays in March and in October and November, so recurring meetings shift by an hour for a week or three.
For more than two cities, use the meeting planner, which finds the hours that fall inside everyone's working day.

Questions

How do I convert a time to another time zone?

Pick the city the time is in, the city you want it in, and enter the time and date. The converter finds the instant that time happens in the first city and shows what the clocks say in the second, daylight saving included.

Why does the date matter?

Because of daylight saving. Countries change their clocks on different dates, and many never change them, so the gap between two cities can be an hour different in March than in January. London and New York are five hours apart most of the year, but four for a few weeks each spring and autumn.

What's the difference between GMT and UTC?

For everyday purposes, none: both are the time at 0° longitude, and UTC is the scientific standard clocks are set by. London uses GMT in winter and BST (UTC+1) in summer, so 'London time' and 'GMT' are only the same half the year.

Why are some time zones 30 or 45 minutes off?

Countries choose their own offsets. India runs on UTC+5:30 as a compromise across its width, Nepal on UTC+5:45, and parts of Australia on half-hour offsets. The converter handles all of them.

Which cities can I pick?

Any city with one of the 3,200+ airports in our list: search by city, airport name, code or country. Each airport carries its IANA time zone, the same database your phone uses.

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