Egypt will plunge into darkness for an hour Saturday night, March 27, as it joins the rest of the world in this special event to save Mother Earth. Officials are making final arrangements at the Pyramids and Sphinx, Cairo Tower, Bibliotheca Alexandrina and the Mohamed Ali Citadel, as lights and other electrical appliances will be turned off at exactly 8:30 p.m. until 9:30 p.m. for the third global Earth Hour activity. An estimated one billion people across 92 countries including Egypt, will be participating in this year's 'Earth Hour' movement hailed as the largest global earth awareness campaign in history, by preparing to turn off- or at least reduce - the use of non-essential lighting and electrical appliances on 27 March, from 8:30 PM to 9:30 PM, local time. Earth Hour uses the simple action of turning off lights and appliances for an hour to deliver a powerful message on the need for climate change solutions. Ninety-two other countries will also conduct the Earth Hour activity at 8:30 p.m. of March 27, to take their stand against climate change. Event organiser Earth Hour Philippines said that as of Thursday evening, 929 towns and 112 cities, consisting of at least 15 million Filipinos, pledged to switch off non-essential lights and appliances in support for the occasion.