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Difference between CET and GMT

Difference between CET and GMT

CET and GMT are two of the most commonly used time zones. But what is the difference between them? And which one is best for you? In this post, we’ll break down the key differences between CET and GMT, so you can make an informed decision about which time zone is right for you.

What is CET?

GMT stands for Greenwich Mean Time. GMT is the mean solar time at the Royal Observatory in Greenwich, London. GMT was formerly used as the international civil time standard, now superseded in that function by Coordinated Universal Time (UTC). GMT is still widely used as a geographical time zone, and GMT+0 is commonly referred to as Zulu time. GMT+0 is also sometimes called GMT itself or Green which Zone.

  • The GMT time zone has no offset from UTC and can be written as UTC±00:00 or Z. It is sometimes confused with WET (Western European Time). GMT+0 is actually not a time zone but rather a time offset. Various countries have made commitments to keep their local clocks within 0.9 seconds of GMT, but most only make adjustments when daylight saving time changes occur.
  • Many computer operating systems include the capability to set the local clock to GMT+0, which is often called “Universal Time Coordinated” (UTC) in technical literature. Since coordinated universal time runs on a 24-hour cycle, it does not have a “GMT+0” designation itself but rather inherits this from its base unit of measurement, SI Seconds.
  • While GMT+0 remains fixed throughout the year and independent of daylight saving status, coordinated universal time changes with daylight saving transitions in countries that observe it. As a result, some software applications that display local times based on coordinated universal time may show different results for GMT+0 depending on whether daylight saving transitions are currently active in the selected location.GMT was established in 1884 by Scottish astronomer and mathematician William Christie during an international conference held in Washington D.C., United States to standardize world time zones.
  • During the conference, it was agreed that all participating countries would adopt GMT as their official national time standard and use it to set their local clocks. The original conference proposal included a provision for a “universal day of rest” between Saturday evening and Sunday morning, but this provision was later dropped due to opposition from religious groups.
  • In 1972, the Conference on Weights and Measures redefined the SI second so that it would become independent of the celestial rotation rate, effectively making GMT an obsolete time standard. However, many countries continue to use GMT as their primary or secondary time standard because it provides a more stable and predictable reference for timestamps than UT1 (which varies due to Earth’s irregular rotation).

For example, air traffic control systems use UT1 for flight planning purposes but typically use GMT for coordination between ground control and aircraft crews since UT1 can vary by several milliseconds over the course of a day while GMT remains fixed. Similarly, Stock exchanges often use UT1 for price discovery while using GMT for trade execution since UT1 can vary considerably during trading hours while GMT remains relatively stable.”

What is GMT?

CET time zone is a time zone that is used in European countries. CET is the time zone for the countries of Austria, Belgium, Czech Republic, Denmark, Germany, Hungary, Liechtenstein, Luxembourg, Netherlands, Poland, Slovakia, Slovenia, and Switzerland. CET time zone is also known as the Central European Time Zone. CET time zone is one hour ahead of Greenwich Mean Time (GMT+1).

  • CET zone covers a large part of Europe including countries like Austria, Czech Republic, Germany, Hungary, etc. CET time zone is also known as Central European Summer Time (CEST) during summer months when Daylight Saving Time(DST) is observed. CET daylight savings time zone is GMT+2. Many African countries use CET as their standard time.
  • Some examples are Gabon, Western Sahara, etc. CETobserves DST from the last Sunday of March till the last Sunday of October every year. This article will provide you with all the necessary information about CETTime Zone. CET stands for Central European Time Zone. This is the standard time that is used by most of the countries in Europe including Austria, Belgium, and many others.
  • The acronym CET can also be expanded to include other time zones like Central European Summer Time and Central European DaylightTime. Most of these time zones are one hour ahead of Greenwich Mean Time orGMT+1. During summer months or daylight saving time, CET becomes CEST which is GMT+2. There are many African countries that use CET as their standard time which including Gabon and Western Sahara to name a few.
  •  All of these time zones observe DST from last Sunday in March until last Sunday in October every year without fail. In conclusion, CET central European Time Zone covers a large part of Europe including countries like Austria, the Czech Republic, and Germany to use this standard time throughout the year with daylight saving times being observed during summer months.

Many African countries also utilize CET standard time to maintain uniformity throughout the continent. If you want to know what the current time is in CET Zone , all you need to do is add one hour to Greenwich Mean Time which most clocks and watches display automatically. So, the next time you travel to any of these European countries or Africa, make sure to set your watch according to CET or CEST depending on the season so that you don’t end up being late for your appointments.

Difference between CET and GMT

CET (Central European Time) is one hour ahead of GMT (Greenwich Mean Time). CET is used in most parts of Europe, while GMT is used in the UK. CET is also sometimes called MEZ (Mitteleuropäische Zeit). CET is in the same time zone as Paris, Madrid, and Berlin. CET is usually written as +1. GMT is usually written as 0. When it is midday in CET, it is 11 am in GMT. When it is 6 pm in CET, it is 5 pm in GMT.


CET is the time zone for most of Europe. The offset from GMT is UTC+1. This means that when it is 12pm in London (CET), it is 7 am in New York City (EST) and 10 am in Los Angeles (PST). GMT, or Greenwich Mean Time, was originally established as the global time standard because it falls within 0 degrees longitude – the prime meridian. Most of Africa, Asia, South America, and Oceania use either GMT or a variation of GMT as their local time.

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