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The Difference Between GMT and UTC. By Anne Buckle. Greenwich Mean Time (GMT) is often interchanged or confused with Coordinated Universal Time (UTC). But GMT is a time zone and UTC is a time standard.
- UTC
Universal Time (UT) was created at the International...
- UTC
- What Is GMT Time and UTC
- Definitions of GMT and UTC
- History
- Zulu Time
- Future of Universal Time
- References and Article Sources
With the globalisation and evolution of international relationships, the need for universal time identification has occurred. Especially, it was vital to have a standardised time zone for communication and military coordinations. The implementation of Greenwich Mean Time (GMT) was the first step to determine the time zone of other countries in rega...
The abbreviation of GMT stands for Greenwich Mean Time. The name derives from the place where the solar time was standardised for everyone: it was established at The Royal Observatory Greenwich. The term “mean”indicates the average time the clocks need to pass through the solar day. Also, considering that each day requires the same interval, the pe...
Origins of GMT
The history of GMT started with the decision of the International Meridian Conference in 1884 to establish the prime meridian which would denote the international standard of time. Considering that Great Britain was a developed marine nation, it used Greenwich Meridian to position own ships. Subsequently, Greenwich meridian was determined as zero degrees longitude, thus, the international standard time2. From that point, every nation used GMT to calculate the time in relation to this standard...
Emergence of UTC
Coordinated Universal Time was introduced as the more accurate replacement of GMT. In 1963, the concept of UTC was established as the primary international standard which would denote how other countries would regulate their time in relation to UTC3. The primary reason why UTC was considered to be a more accurate system was the fact that it used the rotation of Earth and atomic clocks for measurements. Moreover, to maintain the consistent time system, UTC does not observe Daylight Saving Time...
Zulu time denotes the Coordinated Universal Time in the 24-hours standard which is used in the military forces and aviation in particular. Namely, Zulu signifies the universal time standard for the pilots who fly in different time zones7. However, the term Zulu is just the synonym for UTC. The name of the time zone derived from the transmission art...
Consequently, the differences in the terminology of GMT and UTC still create confusion in international cooperation. Even though UTC was introduced as a more accurate time standard, the occurrence of the leap seconds demonstrated that even this system has minor flaws for the universal time synchronisation. One of the most common proposition is to a...
Converting UTC to GMT. This time zone converter lets you visually and very quickly convert UTC to GMT and vice-versa. Simply mouse over the colored hour-tiles and glance at the hours selected by the column... and done! UTC stands for Universal Time. GMT is known as Greenwich Mean Time.
Jan 6, 2018 · An overview of GMT, Greenwich Mean Time, and UTC, Coordinated Universal Time, and how they came about and how they differ.
- Matt Rosenberg
Coordinated Universal Time (UTC) is the primary time standard globally used to regulate clocks and time. It establishes a reference for the current time, forming the basis for civil time and time zones .
GMT (Greenwich Mean Time) and UTC (Coordinated Universal Time) are both time standards used globally. GMT is based on the mean solar time at the Prime Meridian, located in Greenwich, London. It has been historically used as a reference for timekeeping.
Universal Time (UT) was created at the International Meridian Conference in 1884. This is the basis for the 24-hour time zone system we know today. At the time, Greenwich Mean Time (GMT) was chosen as the world’s time standard.
