🌍 Time Zone Difference Calculator
Compare times across multiple cities instantly. Add cities, see the time difference matrix, and find the best meeting window.
Frequently Asked Questions
Subtract one time zone's UTC offset from another. For example, New York (UTC-5) and London (UTC+0) have a 5-hour difference. When it's 9 AM in New York, it's 2 PM in London.
There are 38 time zones in total (24 whole-hour zones plus 14 partial-hour zones). The widest country by time zones is France with 12 zones (including overseas territories). Russia spans 11 zones.
Find the overlapping business hours (9 AM - 5 PM) for all participants. For US-West Coast and Asia, early morning US time (7-8 AM PT) or late evening Asia time works. Use this tool to visualize overlaps.
Yes, DST shifts time by 1 hour in participating regions. Not all countries observe DST. The US, EU, and parts of Australia use DST, while most of Asia and Africa do not.