Koordinattiden

Koordinattiden, also known as Coordinated Universal Time or UTC, is the primary time standard by which the world regulates clocks and time. It is not adjusted for daylight saving time and is effectively a successor to Greenwich Mean Time GMT. UTC is maintained by the International Bureau of Weights and Measures and is used as the basis for civil time all over the world.

UTC is a 24-hour time standard, with a 24-hour day starting at midnight and ending at the next midnight. It is not adjusted for daylight saving time, which means that the time of day remains constant throughout the year. This makes UTC a useful standard for international communication and coordination, as it eliminates the need for time zone conversions.

UTC is based on International Atomic Time TAI, which is a high-precision atomic clock maintained by the International Bureau of Weights and Measures. UTC is adjusted to keep it within 0.9 seconds of UT1, which is a time scale based on the Earth's rotation. This adjustment is made by adding or subtracting a leap second as needed.

UTC is used as the basis for civil time in most countries, with local time zones being offset from UTC by a whole number of hours. For example, the time zone for the United States Eastern Time Zone is UTC-5, meaning that it is 5 hours behind UTC. This allows for the use of a single time standard for international communication and coordination, while still allowing for local time zones to be used for everyday activities.

In summary, Koordinattiden or UTC is a high-precision time standard used as the basis for civil time all over the world. It is not adjusted for daylight saving time and is maintained by the International Bureau of Weights and Measures. UTC is based on International Atomic Time and is adjusted to keep it within 0.9 seconds of UT1. It is used as the basis for civil time in most countries, with local time zones being offset from UTC by a whole number of hours.