How to use
- Choose City A and City B. The current gap appears immediately, phrased as “New York is 5 hours behind London”.
- Below it you will find the current time in both cities, the range the gap moves through during the year, and the date it next changes.
- The table at the bottom maps every hour of today in City A to the time in City B. The row for the current hour is shown in bold.
How the difference is worked out
Every city’s clock is UTC plus an offset, so the time difference is simply City A’s offset minus City B’s. New York on daylight saving time is UTC−4 and London in summer is UTC+1, so New York is −4 − 1 = 5 hours behind.
| City | vs New York in summer (EDT) | vs New York in winter (EST) |
|---|---|---|
| Los Angeles | 3 hours behind | 3 hours behind |
| Chicago | 1 hour behind | 1 hour behind |
| Phoenix | 3 hours behind | 2 hours behind |
| London | 5 hours ahead | 5 hours ahead |
| Paris | 6 hours ahead | 6 hours ahead |
| Dubai | 8 hours ahead | 9 hours ahead |
| Mumbai | 9 h 30 min ahead | 10 h 30 min ahead |
| Tokyo / Seoul | 13 hours ahead | 14 hours ahead |
Phoenix, Dubai, Mumbai, Tokyo and Seoul do not use daylight saving time, so their gap with New York changes when New York switches clocks.
Things to keep in mind
- Countries switch on different dates. The US moves its clocks on the second Sunday in March, Europe on the last Sunday, so for two or three weeks New York is only 4 hours behind London. The same happens between late October and early November. This tool calculates those short windows correctly.
- Southern-hemisphere cities such as Sydney observe daylight saving time from October to April, so the gap between New York and Sydney can be 14, 15 or 16 hours depending on the month.
- Half-hour and 45-minute zones such as India (UTC+5:30), Iran (UTC+3:30) and Nepal (UTC+5:45) are handled exactly.
- To convert a specific date and time, use the time zone converter. To find a meeting time across several cities, try the meeting planner.
FAQ
Why is India’s time zone offset by 30 minutes?
India uses a single national time, IST (UTC+5:30), based on the 82.5° E meridian near the middle of the country, which falls halfway between whole-hour offsets.
Does the table account for daylight saving changes?
Yes. Each row is a real moment in time converted into both cities, so on the day a city changes its clocks you will see an hour skipped or repeated.