Time Zone Difference Calculator
Pick two cities to see the time difference right now, or compare them at a specific date and time.
Istanbul · Turkey
01:21:24
Sunday, October 4
UTC+3
London · United Kingdom
23:21:24
Saturday, October 3
UTC+1
Avoiding Meetings at the Wrong Time
Comparing clocks in two cities can be confusing when you set up a meeting, especially across midnight or a daylight saving change. The time difference calculator automatically works out the difference between the two cities you pick.
International Time Differences (Time Zone Difference)
A meeting with people in several countries needs the local time in each city. Questions like 'How many hours apart are Istanbul and New York?' are answered with daylight saving differences taken into account.
Comparing a Specific Time
Enter a time in city 1 and the tool shows what time it is in city 2 at that moment. If you leave the date empty, today's date in city 1 is used. With the time field empty, both cities show their current time live.
Flight Duration and Travel Planning
Set the departure city as city 1 and the arrival city as city 2, then enter the departure time. The tool shows the time at the destination at that moment; add the flight time to get the local arrival time. The tool does not calculate flight duration itself.
Time Difference Between Istanbul and Major Cities
| City | Time Zone | vs. Istanbul |
|---|---|---|
| Istanbul | UTC+3 (TRT) | Reference |
| London | UTC+0 / UTC+1 (summer) | 2 or 3 hours behind |
| Berlin / Paris | UTC+1 / UTC+2 (summer) | 1 or 2 hours behind |
| Dubai | UTC+4 | 1 hour ahead |
| New York | UTC-5 / UTC-4 (summer) | 8 or 7 hours behind |
| Tokyo | UTC+9 | 6 hours ahead |
* The difference varies by season for countries that observe daylight saving time. Turkey does not observe DST.