The International Date Line itself doesn’t run in a straight line at the request of some Pacific Island nations, who would be split down the middle by the date line. There are standard time zones as well as non-standard ones, just to add some more confusion to the mix.Īs with Daylight Savings Time there is no consistent universal agreement about the implementation of time zones. However, there is some disagreement on whether or not there are 24 or 25 time zones the International Date Line is seen by some as a time zone, but not by others. By this reckoning each time zone is approximately 15 degrees wide. The methods of establishing each time zone come down to determining factors regarding Earth’s orbit around the sun and the 24-hour day. Map showing the standard time zones for the entire world. Once mechanical clocks and watches began gaining in popularity during the early 19th century there continued to be an increase in time standardization. This time would be different for every location but gave an accurate representation of the local time depending on where exactly in the world the sundial was being used. Prior to the establishment of the Greenwich Mean Time the time of day would be calculated with a sun dial using solar time. Different cities within England and around the world still kept their local times. By using the time and a few other navigational instruments sailors could accurately predict their location without needing to have a visible landmass nearby. The organization established the set time to assist sailors and mariners in navigation while at sea, as the method of doing so had been perfected by that time. Greenwich Mean Time was first set up in 1675 by the Royal Observatory. Galvano-Magnetic 24 Hour Clock, Royal Observatory, Greenwich.
0 kommentar(er)
