No meridians are called the time meridian. The Greenwich meridian which passes through Greenwich, London is called the prime meridian. From which time zones are calculated.
The standard meridian time for Europe is Greenwich Mean Time (GMT)
gmt time of london is gmt+1.00 while gmt time of india is gmt+5.30
If you are to the west of the Greenwich Meridian (as is the US, for example) You subtract an hour for each time zone. Eastern Standard Time in the US is 5 hours behind GMT. Be sure to adjust for daylight saving time. GMT is always standard time. If you are to the east of the Greenwich Meridian, you add an hour for each time zone.
Greenwich Mean Time or Greenwich Meridian Time (GMT) is the prime meridian located at the former Royal Observatory in Greenwich, England. The start of a solar day originally occurred at noon. But in 1925 the numbering system for GMT was changed, and 0000 GMT now allows the day to begin at midnight.
G.M.T. is Greenwich Mean Time.Greenwich, England has been the home of Greenwich Mean Time (GMT) since 1884. GMT is sometimes called Greenwich Meridian Time because it is measured from the Greenwich Meridian Line at the Royal Observatory in Greenwich. Greenwich is the place from where all time zones are measured.
G.M.T. is Greenwich Mean Time.Greenwich, England has been the home of Greenwich Mean Time (GMT) since 1884. GMT is sometimes called Greenwich Meridian Time because it is measured from the Greenwich Meridian Line at the Royal Observatory in Greenwich. Greenwich is the place from where all time zones are measured.
India Standard Time (IST) = GMT+5:30. So, India is 5 1/2 hours ahead of Greenwich.
G.M.T which stands for Greenwich Meridian Time.
At the Royal Observatory in Greenwich, England, which is located on the Prime Meridian.
GMT stands for Greenwich Meridian Time
Greenwich Mean Time is the local mean time at Greenwich, England, which is along the prime meridian (0° longitude).