Earth hour starts at 8:30pm at your local time and finishes at 9:30pm your local time. In 2011, Earth Hour is on 26 March.
Earth Hour is on march 27th 2010 at 8:30pm to 9:30pm
it began from the formation of the earth. earth started as a ball of fire
60 minutes = 1 hour. time is a constant so an hour on Mercury is the same as an hour on earth.
A rolling 24 hour period has indefinite start and stop times. Our Earth day is 24 hours and begins at 12:00am. A rolling 24 hour period could begin at any time during the day or night and end 24 hours later.
Earth Hour : 23rd March 2013It is observed from 20:30 to 21:30 hour local time of each place.
Earth Hour 2009 was carried out across 25 time zones, and involved 4000 cities in 88 countries.
In most parts of the world, Earth Hour 2009 took place from 8:00pm-9:00pm on the last Saturday of March. In Australia, Earth Hour was held from 8:30pm to 9:30pm.
The earth is approximately 4.5 billion years old. The Christian Era began about two thousand years ago. Represented on a 24-hour clock, the Christian Era would be the last thirtieth of a second since the earth was formed.
Earth Hour around the world was held from 8:00pm - 9:00pm, local time, on 28 March 2009. Earth Hour 2009 in Australia was 8:30pm-9:30pm on Saturday 28 March 2009.
The next Earth Hour event will take place on March 28, 2009. Earth Hour takes place from 8:00 - 9:00 pm in their respective time zone in every city. Earth Day is celebrated each year on April 22nd.
That can happen at any hour, or almost at any hour. If you go halfway around the Earth in one direction, your time will be UTC + 12 hours; whereas if you go halfway round the Earth in the opposite direction, your time will be UTC - 12 hours - so, a full day difference.