What is GMT to EST?
Living in U.S can be comfortable. Sleeping in the comfort your home, with nice soft pillow, quiet neighbors, and a couple of romance with your partner (that is, if you have a girlfriend/boyfriend). It feels good, right? You can dream the best dream that you can imagine. But the only thing that pisses you off during your deep slumber’¦ is a prank call by someone in London.
That’s the worst’¦
If we put it the other way around, you’re the caller. If you don’t know what the time difference between GMT to EST is, then don’t call at all. People might hunt you down for messing up their sleep. To prevent that from happening, let’s learn what GMT and EST are.

What is GMT?
GMT or the Greenwich Mean Time is a term that primarily refers to ‘mean solar time’ developed at the Royal Observatory in Greenwich, London. It is also referred as Coordinated Universal Time (UTC). The GMT time zone was used especially to those bodies connected to United Kingdom. Astronomers use UTC rather than GMT. But before the UTC was introduced in 1972, GMT has been the Universal Time (UT) in which was the standard astronomical concept used for many technical fields.

When and where do we observe GMT?
Iceland and Reykjavik uses GMT for the whole year. But not all those countries that belong to Europe, uses GMT in the whole year. You might find it odd that a country changes time zones. Some European countries like Ireland, London, United Kingdom and its islands (England, Wales, Scotland, and Northern Ireland) only use GMT during winter.

What is EST?
EST or the Eastern Standard Time of the Western Hemisphere is also known as North American Eastern Standard Time (NAEST) is the time zone that fall mostly on the east coast of North America. EST was established under the Uniform Time Act in the USA during 1966. In United States and in Canada, EST was generally called just Eastern Time (ET). Why? It is because EST is only observed as standard time during winter. So, what about summer? During summer, most parts of U.S and Canada use EDT or the Eastern Date Time when observing daylight saving time.

When and where do we observe EST?
Most U.S countries like Connecticut, Delaware, District of Colombia, Florida’s southern and eastern parts, Georgia, Some parts of Indiana, Eastern Kentucky, Maine, Maryland, Massachusetts, Michigan, New Hampshire, New Jersey, New York, North Carolina, Ohio, Pennsylvania, Rhode Island, South Carolina, Eastern Tennessee, Vermont, Virginia and West Virginia; uses EST during winter.

In some part of Canada like Nunavut, Ontario, and Quebec uses EST during winter as well. There are also countries that use EST in the whole year. Some are Cayman Islands and George Town.

Technically speaking, UTC is now used rather than GMT or EST. But it depends on people what they prefer to use. So, if you’re planning to get a flight from London to New York, don’t be surprised if you arrive with a 5-hour gap. It is better to know something than know nothing, right?