what is the time difference between utc and gmt
fractional second
title: Coordinated Universal Time text: Coordinated Universal Time Coordinated Universal Time (abbreviated to UTC) is the primary time standard by which the world regulates clocks and time. It is within about 1 second of mean solar time at 0° longitude, and is not adjusted for daylight saving time. In some countries where English is spoken, the term Greenwich Mean Time (GMT) is often used as a synonym for UTC. The first Coordinated Universal Time was informally adopted on 1 January 1960 and was first officially adopted as CCIR Recommendation 374, "Standard-Frequency and Time-Signal Emissions", in 1963, but the official abbreviation of UTC and the official title: Time in the United States text: prime meridian. In 1960, the International Radio Consultative Committee formalized the concept of Coordinated Universal Time (UTC), which became the new international civil time standard. UTC is, within about 1 second, mean solar time at 0°. UTC does not observe daylight saving time. For most purposes, UTC is considered interchangeable with GMT, but GMT is no longer precisely defined by the scientific community. UTC is one of several closely related successors to GMT. Standard time zones in the United States are currently defined at the federal level by law 15 USC §260. The federal law also establishes the transition dates title: Time standard text: reality mean time at Greenwich. Greenwich Mean Time is still the legal time in the UK (in winter, and as adjusted by one hour for summer time). But Coordinated Universal Time (UTC) (an atomic-based time scale which is always kept within 0.9 second of UT1) is in common actual use in the UK, and the name GMT is often inaccurately used to refer to it. (See articles Greenwich Mean Time, Universal Time, Coordinated Universal Time and the sources they cite.) Universal Time (UT) is mean solar time at 0° longitude; some implementations are Ephemeris time and its successor time scales title: Coordinated Universal Time text: is the international regulatory body which defines Coordinated Universal Time. No decision to suppress leap seconds was reached; the issue will be studied further and reconsidered in 2023. Coordinated Universal Time Coordinated Universal Time (abbreviated to UTC) is the primary time standard by which the world regulates clocks and time. It is within about 1 second of mean solar time at 0° longitude, and is not adjusted for daylight saving time. In some countries where English is spoken, the term Greenwich Mean Time (GMT) is often used as a synonym for UTC. The first Coordinated Universal Time was informally adopted title: UTC offset text: is the equivalent to GMT. A "time zone" is a geographical region in which residents observe the same standard time. A "time offset" is an amount of time subtracted from or added to Coordinated Universal Time (UTC) time to get the current civil time, whether it is standard time or daylight saving time (DST). In any particular time zone, residents either observe standard time all year round (as in Russia or South Africa), or observe standard time during winter and daylight time during summer (as in most of the United States and Europe). Several regions in North America, Europe and