Where is 5 hours ahead of gmt

There were two main reasons for this. The first was that the USA had already chosen Greenwich as the basis for its own national time zone system. As the reference for GMT, the Prime Meridian at Greenwich therefore became the centre of world time and the basis for the global system of time zones. Therefore this also became the start of the Universal Day. The meridian line is marked by the cross-hairs in the Airy Transit Circle eyepiece.

Find out more about the Airy Transit Circle. The Shepherd gate clock can be seen at the gates to the Royal Observatory. It was the first clock ever to show Greenwich Mean Time directly to the public. It is a 'slave' clock, connected to the Shepherd master clock which was installed at the Royal Observatory in From that time until , the Shepherd master clock was the heart of Britain's time system.

Its time was sent by telegraph wires to London, Edinburgh, Glasgow, Dublin, Belfast and many other cities. By , time signals were also sent from the clock to Harvard University in Cambridge, Massachusetts via the new transatlantic submarine cable. In terms of the distribution of accurate time into everyday life, it is one of the most important clocks ever made. The first thing you notice about the clock is that it has 24 hours on its face rather than the usual That means at 12 noon the hour hand is pointing straight down rather than straight up.

The clock originally indicated astronomical time, in which the counting of the 24 hours of each day starts at noon. The clock was changed in the 20th century to indicate Greenwich Mean Time, in which the counting of the 24 hours of each day starts at midnight. Learn the story of Greenwich Mean Time in our publications. Keep track of time with our famous Shepherd Gate clock replica for your wall.

Visit us. Royal Observatory. Swatch even invented a concept called beat time that split each day into 1, beats on a decimal system, eradicating time zones entirely. For those of you who don't operate on Internet Time, this spreadsheet shows the time zone in countries, extracted from our World Factfiles series.

Flickr Please post your visualisations and mash-ups on our Flickr group or mail us at datastore guardian. Turn autoplay off Turn autoplay on. Jump to content [s] Jump to comments [c] Jump to site navigation [0] Jump to search [4] Terms and conditions [8]. News Datablog. Time zones around the world, in every country There are 24 time zones around the world. It's difficult to answer because the U. What point in the U. Hawaii is ten hours behind Greenwich mean time. But Mexico will no longer be 12 t In some ways, none do, because India collapsed its two time zones into one during the split with Pakistan.

So the time right now in India is either Greenwich Mean Time. Since the Earth is round, there needs to be a notational line where things begin and end, and the Prime Meridian is it for time. Time differences between London UK and other countries. Time differences between New Delhi India and other countries.