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.
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.
23 hours instead of one day (because not all of the world has a day of 24 hours)
The "hour of Venus" is often associated with Venus being visible in the evening or morning sky, but it doesn't have a specific definition related to Earth Hour. Earth Hour is an annual event where participants turn off non-essential lights for one hour to raise awareness about climate change and energy conservation. The hour of Earth Hour typically occurs on the last Saturday of March at 8:30 PM local time. Therefore, the concept of "hour of Venus" does not directly correlate with Earth Hour.
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 2009 was carried out across 25 time zones, and involved 4000 cities in 88 countries.
Earth Hour : 23rd March 2013It is observed from 20:30 to 21:30 hour local time of each place.
For every 15 degrees of longitude traveled eastwards, there is typically a time difference of one hour ahead. This is due to the Earth's rotation at 15 degrees per hour.
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.