World Clock
See the current time in major cities and timezones around the world.
Frequently Asked Questions
What is UTC and why is it the standard?
UTC (Coordinated Universal Time) is the primary international time standard used to regulate clocks worldwide. It is the successor to GMT and does not observe daylight saving time, making it a stable reference point. All other timezones are defined as UTC offsets (e.g. UTC+9 for Japan, UTC−5 for Eastern US Standard Time).
What is the difference between GMT and UTC?
In practice, GMT (Greenwich Mean Time) and UTC show the same time. The difference is conceptual: UTC is an atomic-clock-based scientific standard, while GMT is a historical timezone. For everyday purposes they are interchangeable, but technically UTC is the modern standard.
Which cities are furthest apart in time?
The maximum time difference on Earth is 26 hours, due to some island nations in the Pacific choosing UTC+14 (Line Islands, Kiribati) while others use UTC−12 (Baker Island). The difference between New York (UTC−5) and Tokyo (UTC+9) is 14 hours.
How do I find a good meeting time across time zones?
Use the Timezone Converter tool to find overlapping business hours. For New York and London, there is a 5-hour gap: 9 AM New York = 2 PM London. For global teams spanning 3+ continents, a meeting time that suits everyone is often impossible — typically one party will be outside their work hours.