where is GMT?

Question

can you show the global map where GMT line is?

Answer 1

Greenwich Mean Time (GMT) is a term originally referring to mean solar time at the Royal Observatory, Greenwich in England. It is now often used to refer to Coordinated Universal Time (UTC) when this is viewed as a time zone, although strictly UTC is an atomic time scale which only approximates GMT in the old sense. It is also used to refer to Universal Time (UT), which is the astronomical concept that directly replaced the original GMT.

Noon Greenwich Mean Time is not necessarily the moment when the Sun crosses the Greenwich meridian (and reaches its highest point in the sky in Greenwich) because of Earth's uneven speed in its elliptic orbit and its axial tilt. This event may be up to 16 minutes away from noon GMT (this discrepancy is known as the equation of time). The fictitious mean sun is the annual average of this nonuniform motion of the true Sun, necessitating the inclusion of mean in Greenwich Mean Time.

Historically the term GMT has been used with two different conventions for numbering hours. The old astronomical convention (before 1925) was to refer to noon as zero hours, whereas the civil and more modern convention is to refer to midnight as zero hours. The more specific terms UT and UTC do not share this ambiguity, always referring to midnight as zero hours.

Although civil time in the United Kingdom, e.g., the Greenwich Time Signal, is in practice now based on UTC, the winter time scale, which is equal to UTC, is still popularly called GMT. Civil time in the UK is legally (but not practically) still based on astronomical GMT, not UTC.

Those countries marked in dark blue on the map above use Western European Summer Time and advance their clock one hour in summer. In the United Kingdom, this is known as British Summer Time (BST); in the Republic of Ireland it is called Irish Summer Time (IST). Those countries marked in light blue keep their clocks on UTC/GMT/WET year round.

Answer 2

GMT is Greenwich Mean Time, at Greenwich England 0 degrees longititude. Now if memory serves me right, it you follow the line all the way around you eventually come to other side of the world and to the international date line...I think!

Answer 3

Straight down the middle. GMT stands for Greenwich Mean Time and as the other guy said, it is zero degrees longitude and passes through Greenwich (pronounced Grennitch), England.

Answer 4

Greenwich mean time is an imaginary line running straight through Greenwich just outside London. it was created in Stuart times when people were very interested in the shape of the earth. all time is measured by using the longitude lines to the left and right of this line

Answer 5

GMT= Greenwich Mean Time
and it is in Greenwich, England

Answer 6

the area covered between the lines of longitude 7 1/2 degrees W to 7 1/2 degrees E. The center of this area is the prime meridian or zero degrees longitude. The sun time for this line is used in the entire area.

Answer 7

GMT is also referred to as UTC or Coordinated Universal Time (UTC is the abbreviation in French.)

The prime meridian runs through the middle of the Observatory in Greenwich England.
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Answer 8

zero degree longitude running north-south through Greenwich, England

Answer 9

you can see the "line" in GREENWICH - IN england.
ofcourse, it is a virtual line - and if you can see it there - it is just for the tourists...

Answer 10

greenwich meantime