World Time Converter

UTC (Coordinated Universal Time) and GMT (Greenwich Mean Time) point to the same moment in time, but UTC is the internationally adopted standard. GMT is based on astronomical observation, while UTC uses atomic clocks for greater precision.

Korea Standard Time (KST) is based on the 135°E meridian, placing it 9 hours ahead of UTC. It shares the same offset as Japan Standard Time (JST) and does not observe Daylight Saving Time.

Daylight Saving Time (DST) is the practice of advancing clocks by one hour during summer months. It is observed in the US, Europe, and other regions, typically starting in March and ending in November. This converter automatically accounts for DST.

Communicating in UTC avoids confusion. For example, a 'UTC 09:00 meeting' means 18:00 in Seoul and 04:00 EST in New York — each participant converts to their local time.

A time zone is a region of the globe that observes a uniform standard time. The world is divided into 24 time zones based on longitude, though political and economic boundaries mean time zones don't always follow exact longitudinal lines.