UTC and GMT Explained
Coordinated Universal Time, abbreviated as UTC, is the common reference used to describe the same moment across different local time zones.
What is a UTC offset?
A location at UTC+01:00 is one hour ahead of UTC, while a location at UTC-05:00 is five hours behind it. Some offsets also include minutes.
UTC and local time
UTC does not move forward or backward for daylight saving time. A region's current offset can change when local daylight-saving rules apply, which is why named regional time zones are useful.
What is GMT?
GMT means Greenwich Mean Time. The term remains common in everyday language and some time-zone names, while UTC is the main international reference for timekeeping.
Using UTC in World Clock
World Clock handles time-zone calculations for you. Search for a city or country to see live local time, its difference from your device time and the result in your chosen 12-hour or 24-hour format.