Current time in Coordinated Universal Time (UTC)
08:19 AMFriday, Mar 05, 2021
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. The Royal Observatory in the UK.
Prior to 1972, this time was called Greenwich Mean Time (GMT) but is now referred to as Coordinated Universal Time or Universal Time Coordinated (UTC). It is a coordinated time scale, maintained by the Bureau International des Poids et Mesures (BIPM). It is also known as "Z time" or "Zulu Time".
- What Is GMT Time and UTC
- Definitions of GMT and UTC
- 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 regard to GMT+0. Therefore, the difference in time for other countries is indicated either by adding or subtracting hours from GMT time. The primary difference remains to be the fact that GMT is the denomination of a timezone, while UTC is the title of the time standard.
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 pendulum clocks at the observatory was the perfect mechanism to standardise time for the universal coordination. Coordinated Universal Time (UTC) came to replace GMT with the more accurate and scientific measurements of time1. Although the abbreviation does not match the term, it was used as a compromise for the translation from European languages. UTC differs from GMT due to 24-hour system, which starts counting from midnight. To calculate the UTC time, the atomic clocks with frequency cycles are usedto display the accurate measurements of time. Nevertheless, same as for GMT, the primary purpose of UTC is to denote the universal time zone i...
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 articulation of the letter Z (Zulu). Considering that Z signifies +0 offset from the prime meridian, it is was implemented for the military coordination in time. Eventually, Zulu time replaced GMT with the more accurate timekeeping system of UTC8. This time standard is required for the naval, aviation, and other forms of military communication and coordination of actions in different time zones. There is also a specific rule on how to read and pronounce Zulu time. Namely, there is no colon between numbers and it identifies four digits in a row. For instance, 07:00 should be pronounced as “zero seven hundred” (0700).
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 abandon leap seconds adjustments because it would go out sync with civil time very slowly 9. Although abandoning the adjustments of civil time would make a difference only in the extremely long-term perspective, it is still significant for the software around the world, which was programmed with the consideration of UTC. Besides, considering the growing differences between time of day and clocks, the need for a new system of timekeeping will be needed in the future 10. Nevertheless, UTC still remains to be the most common universal standard of time for all countries.
- But Why Greenwich?
- The United States Joins in
- Coordinated Universal Time
- The Time Ball
Greenwich was a royal park and palace on a hill to the south of the River Thames east of London, England. In 1675, King Charles II offered the land to The Royal Society for Britain’s first national observatory. Highly acclaimed British architect, Christopher Wren was commissioned to design the domed building. Soon after, John Flamsteed was appointed as the first Astronomer Royal and moved into the new Royal Observatory. In 1767, the fifth Astronomer Royal, Nevil Maskelyne brought Greenwich Mean Time to a wider audience by introducing the Nautical Almanac as part of the great 18th-century quest to determine longitude. British mariners started keeping at least one chronometer set to GMT. This meant they could calculate their longitude from the Greenwich meridian (also referred to as the “Prime meridian,” or longitude 0°). These two solutions would help pave the way for GMT to become the worldwide time standard a little more than a century later. The British Royal Observatory at Greenw...
GMT was then adopted by the United States on November 18th, 1883. There were two main reasons for this: The first was that we had already chosen Greenwich as the basis for our own national time zone system. The chosen moment was at noon on that day, when the telegraph lines transmitted time signals to all major cities. Prior to that, incredibly, there were over 300 local times in the United States. Very confusing to say the least! The second was that in the late 19th century, 72% of the world’s commerce depended on sea charts, which used the 0° Prime meridian of Greenwich as the primary line of longitude. On November 1st, 1884, GMT was adopted universally at the International Meridian Conference in Washington, DC. As a result, the International Date Line was drawn up and 24 time zones were also created. Across the contiguous United States, there are four time zones, which are aligned with four “standard” meridians. Fifteen degrees of longitude is equal to one hour. 1. 1.1. 1.1.1. Ea...
While Greenwich Mean Time is still used, in 1972, a new term was introduced: Coordinated Universal Time (UTC). Although both GMT and UTC display the same time, there is a difference: GMT is now considered just a time zone officially used in some European and African countries. But UTC is not a time zone, but rather the new time standard that is the basis for clock time and time zones worldwide. This means that no country or territory officially uses UTC as a local time. Today we use atomic clocks for time keeping and they are exceedingly accurate, losing only one second over a time span of 15 billion years. Due to the fact that the rotation of the Earth is currently slowing at a non-uniform rate, periodically we need to insert a “leap second” into the UTC time scale to help bring “Mother Earth” back into step with our atomic clocks.
No doubt you have seen onNew Year’s Eve the “Ball Drop”from the roof of One Times Square in New York, where a brightly lit ball descends 141 feet in 60 seconds down a specially designed flagpole. The end of its descent marks the end of the old and the beginning of the New Year, and has been staged annually every year since 1907 (except during World War II in 1943 and 44).
People also ask
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Is UTC a time zone?
Convert Time From (UTC/GMT) to any time zone. Need to compare more than just two places at once? Try our World Meeting Planner and get a color-coded chart comparing the time of day in (UTC/GMT) with all of the other international locations where others will be participating.
Greenwich Mean Time is same as the UTC universal time. UTC to GMT Time Conversion Table UTC to GMT in 12-hour (AM/PM) time format. UTC to GMT in 24-hour time format.UTC TimeGMT Time12:00 AM12:00 AM01:00 AM01:00 AM02:00 AM02:00 AM03:00 AM03:00 AM
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. Although GMT and UTC share the same current time in practice, there is a basic difference between the two: GMT is a time zone officially used in some European and African countries.
GMT/UTC time difference/offset in every US state. Current Time in US Time Zones Pacific Mountain Central Eastern Alaska Hawaii The continental United States (the 48 ...
Coordinated Universal Time UTC - Greenwich Mean Time GMT Offset Coordinated Universal Time (UTC) is used as the official world reference for time. Coordinated Universal Time replaced the use of Greenwich Mean Time (GMT) in 1972. You will often see time zones represented similar to UTC - 5h or GMT - 5h.Time Zone in United StatesExamples of places in the United States using these Time ZonesUTC Offset Standard TimeUTC Offset Daylight Saving TimeAtlanticPuerto Rico, US Virgin IslandsUTC - 4hN/AEasternConnecticut, Delaware, Florida, Georgia, part of Indiana, part of Kentucky, Maine, Maryland, Massachusetts, Michigan, New Hampshire, New Jersey, New York, North Carolina, Ohio, Pennsylvania, Rhode Island, South Carolina, part of Tennessee, Vermont, Virginia, West Virginia and Washington, D.C.UTC - 5hUTC - 4hCentralAlabama, Arkansas, Florida, Illinois, part of Indiana, Iowa, part of Kansas, part of Kentucky, Louisiana, part of Michigan, Minnesota, Mississippi, Missouri, Nebraska, North Dakota, Oklahoma, part of South Dakota, part of Tennessee, most of Texas, and WisconsinUTC - 6hUTC - 5hMountainArizona*, Colorado, part of Idaho, part of Kansas, Montana, part of Nebraska, New Mexico, part of North Dakota, part of Oregon, part of South Dakota, part of Texas, Utah, and WyomingUTC - 7hUTC - 6h * n/a for Arizona except in the Navajo Nation which does observe daylight saving time.
- related to: What is UTC or GMT time?
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