Time Zone Converter
Time Zone Converter
Convert a time between any two time zones or cities, with daylight saving applied for the date you choose. See the time difference, both UTC offsets, where working hours overlap, an hour by hour table and the same moment in major cities around the world.
The two days side by side
Conversions use your browser’s built in time zone database, the same IANA database used by phones and computers, so daylight saving dates are applied for each place on the date shown. Eastern, Central, Mountain and Pacific Time follow daylight saving, so in summer they are EDT, CDT, MDT and PDT rather than EST, CST, MST and PST. If a time falls in the hour skipped when clocks go forward, it is moved on by an hour; if it falls in the hour repeated when clocks go back, the first occurrence is used. The CSV, image and printed report contain the values you entered, nothing preloaded.
How to use this tool
Type a time, choose where it is from and where you want it in, and the converted time appears at once. Leave the date blank to use today, or pick the date of a meeting, because daylight saving can change the answer by an hour. Swap flips the direction, and the strips and table underneath show every hour of the day side by side, with working hours shaded so you can see when both places are at their desks.
The choice people most often get wrong is the zone name. EST strictly means winter time on the US east coast; in summer New York is on EDT, an hour different. Choosing Eastern Time or New York, rather than a fixed offset, lets the converter apply the right one for the date.
What the calculation is doing
Every place keeps its clock a set number of hours from Coordinated Universal Time, UTC. The converter finds the offset for the starting place on that date, turns the time into UTC, then adds the offset of the destination. 9:00 AM in New York in September is UTC−4, so it is 13:00 UTC; London is on UTC+1 then, so it is 14:00, 2:00 PM.
The offsets come from the IANA time zone database built into your browser, the same data phones and computers use, which records when every country starts and ends daylight saving and when rules have changed over the years. That is why the answer can differ by an hour depending on the date you pick.
Why the gap between two cities is not fixed
Daylight saving is decided country by country. The US and Canada move their clocks forward on the second Sunday in March and back on the first Sunday in November; the UK and the European Union change on the last Sundays of March and October. Most of Asia, including India, China and Japan, does not change at all, and in the southern hemisphere Australia and New Zealand move their clocks the other way, forward in October and back in April.
So the gap between two places can take several values in a year. New York to London is 5 hours for most of the year but 4 hours for a few weeks in March and around Halloween. New York to Sydney swings between 14 and 16 hours, because the two are on summer time at opposite times of year. Scheduling across zones is safest when the meeting date, not just the time, is part of the conversion.
A few zones are not whole hours from UTC. India is UTC+5:30, Newfoundland UTC−3:30 in winter, and Nepal UTC+5:45, so a clean hour in one place can be a half or three quarter hour in another.
Common zones and their offsets
| Zone | 15 January 2026 | 15 July 2026 | Daylight saving |
|---|---|---|---|
| Eastern Time, New York and Toronto | UTC−5 | UTC−4 | northern summer |
| Central Time, Chicago | UTC−6 | UTC−5 | northern summer |
| Mountain Time, Denver | UTC−7 | UTC−6 | northern summer |
| Arizona, Phoenix | UTC−7 | UTC−7 | no |
| Pacific Time, Los Angeles | UTC−8 | UTC−7 | northern summer |
| Alaska, Anchorage | UTC−9 | UTC−8 | northern summer |
| Hawaii, Honolulu | UTC−10 | UTC−10 | no |
| Atlantic Time, Halifax and Moncton | UTC−4 | UTC−3 | northern summer |
| Newfoundland, St. John’s | UTC−3:30 | UTC−2:30 | northern summer |
| UK, London | UTC | UTC+1 | northern summer |
| Central Europe, Paris and Berlin | UTC+1 | UTC+2 | northern summer |
| Eastern Europe, Athens | UTC+2 | UTC+3 | northern summer |
| Gulf, Dubai | UTC+4 | UTC+4 | no |
| Pakistan, Karachi | UTC+5 | UTC+5 | no |
| India, Delhi | UTC+5:30 | UTC+5:30 | no |
| China, Beijing | UTC+8 | UTC+8 | no |
| Japan, Tokyo | UTC+9 | UTC+9 | no |
| Australia East, Sydney | UTC+11 | UTC+10 | southern summer |
| New Zealand, Auckland | UTC+13 | UTC+12 | southern summer |
A worked example you can check on paper
A call is set for 9:00 AM Eastern Time on 21 September 2026. How late is that in Delhi? New York is on daylight saving then, UTC−4, so 9:00 AM is 9 + 4 = 13:00 UTC. India is on UTC+5:30 all year, so add 5 hours 30 minutes: 13:00 + 5:30 = 18:30, which is 6:30 PM in Delhi.
The same call on 15 December is different. New York is back on standard time, UTC−5, so 9:00 AM is 14:00 UTC, and Delhi is 14:00 + 5:30 = 19:30, 7:30 PM. The meeting did not move in New York, but it moved an hour later in Delhi.
Mistakes that catch people out
Writing EST in summer. A time quoted as EST between March and November usually means EDT. Say ET, or name a city, and the ambiguity disappears.
Assuming the gap never changes. Check recurring meetings around March, April, October and November, when different countries change clocks on different dates.
Forgetting the date line. A Tuesday morning in Sydney is still Monday afternoon in Los Angeles; the table and strips say which day each time falls on.
Rounding half hour zones. India, Newfoundland, South Australia and Nepal are not whole hours from UTC, so a 9:00 call can land on a :30 or :45.
Scheduling in the skipped hour. On the night clocks go forward, 2:00 to 3:00 AM does not exist in much of North America, so an automated job set for 2:30 AM may not run.
Popular calculations
Each opens the converter with those places and that time filled in, for today’s date; pick another date to plan ahead.
Between time zones
Between cities
How this was checked
Conversions were checked against the IANA database rules for the dates involved: New York to London at 5 hours in September and January and 4 hours on 20 March 2026, Eastern Time to India at 9 hours 30 minutes in summer and 10 hours 30 minutes in winter, Sydney to Los Angeles across the date line, and Kathmandu at UTC+5:45. The skipped hour on 8 March 2026 and the repeated hour on 1 November 2026 in New York were tested and handled as described.
Every address in the lists above was then opened and checked for a distinct title, a correct conversion, strips and a clock that render, and clean CSV, image and print output containing only that conversion, at desktop, tablet and phone widths.
Common questions
What is the time difference between Eastern Time and Pacific Time?
Pacific Time is 3 hours behind Eastern Time all year, because both change their clocks on the same dates. 9:00 AM in New York is 6:00 AM in Los Angeles.
What is the difference between EST and EDT?
EST, Eastern Standard Time, is UTC−5 and is used in winter. EDT, Eastern Daylight Time, is UTC−4 and is used from the second Sunday in March to the first Sunday in November. People often say EST all year, but in summer the clocks are on EDT.
How many hours ahead is India of the US east coast?
India is on UTC+5:30 all year and does not use daylight saving. It is 10 hours 30 minutes ahead of New York in winter and 9 hours 30 minutes ahead in summer, when New York moves to UTC−4.
Is GMT the same as UTC?
For everyday time, yes: both have an offset of zero. UTC is the precise atomic time standard and GMT is the name of the time zone. The UK uses GMT in winter but British Summer Time, UTC+1, in summer, so London time is not always GMT.
Why is the gap between New York and London sometimes 4 hours?
The US moves its clocks forward on the second Sunday in March and back on the first Sunday in November, while the UK changes on the last Sundays of March and October. For those few weeks in between, the usual 5 hour gap is 4 hours.
What happens to a time that falls in the daylight saving jump?
When clocks go forward, one hour is skipped, so a time such as 2:30 AM does not exist that night; the converter moves it on to 3:30 AM. When clocks go back, one hour happens twice, and the first occurrence is used.
Related Calculators and Reference
- Time Calculator: add or subtract hours from a clock time, or find the time between two times.
- Military Time Converter: switch between the 12 and 24 hour clocks.
- Date Difference Calculator: days and weeks between two dates.
- Days From Today Calculator: the date of a meeting a number of days ahead.
- Sunrise and Sunset Calculator: sunrise, sunset and twilight times for any place, with daylight saving applied by date.
- IANA Time Zone Database: the database of zones and daylight saving rules the converter uses.