The Royal Observatory, Greenwich (formerly the Royal Greenwich Observatory or RGO), in London, England played a major role in the history of astronomy and navigation, and is best known as the location of the prime meridian. It is situated on a hill in Greenwich Park, overlooking the River Thames.
The observatory was commissioned in 1675 byKing Charles II, with the founding stone being laid being laid on 10 August 1675.
The scientific work of the observatory was relocated elsewhere in the first half of the 20th century and the Greenwich site is now maintained as a touristic attraction.GMT is now often called Universal Time, which is now calculated from observations of extra-galactic radio sources.
Humans have long used the 24 hours solar cycle as the basis for our clock-based time measurements, dividing the day into hours, minutes and seconds.
Time zones
For time conversion please check this world clock: http://www.timeanddate.com/worldclock/
The schedule of our lives is shaped by the movements of the earth, moon, and sun.
In ancient Rome, a priest observed the sky and announced a new moon cycle to the King. For centuries afterward, Romans referred to the first day of each new month as Kalends (from their word calare, which means "to proclaim”).
The word calendar derived from this custom.
Nowadays Daylight Saving Time gives us the opportunity to enjoy sunny summer evenings by moving our clocks an hour forward in the spring.
Yet, the implementation of Daylight Saving Time has been fraught with controversy since Benjamin Franklin conceived of the idea. Even today, regions and countries routinely change their approaches to Daylight Saving Time.
Here, you can learn about the history of daylight saving (or as some may say, daylight shifting), the standardization of time, and when regions around the globe spring ahead and fall back. Enjoy!
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