Time Zone Difference Calculator

Never Join a Meeting at the Wrong Time Again

Time zone arithmetic becomes essential for international business calls, online meetings, staying in touch with family and friends abroad, or planning flights. Turkey is in the UTC+3 zone (TRT — Turkey Time). This tool compares the live time and the difference between any two cities you choose, in real time.

How to Use

Time Difference Between Istanbul and Major Cities

* The difference varies by season for countries that observe daylight saving time. Turkey does not observe DST.

How to Interpret the Results

A positive difference (+X hours) means the selected city is ahead of Istanbul; a negative difference (−X hours) means it is behind. If both cities share the same time zone, a "Same time zone" message is displayed — though this can change seasonally due to daylight saving time differences.

Things to Keep in Mind When Planning International Meetings

1. European countries observe daylight saving time between March and October; Turkey has not observed DST since 2016. As a result, the offset shifts from season to season.
2. Flight ticket times are always in local time; use this tool to correctly calculate arrival times for flights departing Istanbul and landing in a different time zone.
3. The US spans multiple time zones: East Coast (New York) is UTC-5/-4, West Coast (Los Angeles) is UTC-8/-7.
4. China uses a single time zone (UTC+8) across the entire country; as a result, western regions are geographically far outside this zone but still follow the same official time.