In 2011, Earth Hour received support from the Zambia Electricity Supply Corporation(ZESCO), a strategic partner in the campaign for the planet in Zambia. Earth Hour got endorsements from ZESCO's 'Switch Off and Save Campaign' programme which encourages customers to conserve power by switching off non-essential appliances and lights.
Earth Hour has also received massive support from the hospitality industry bringing together hotels such as Intercontinental hotel, Taj Pamodzi Hotel, Golden Bridge Hotel and Raddison Blu Hotel among others.
Other partners in the private sector who have come aboard to support and participate in the Earth Hour campaigns in Zambia include Lafarge Cement Zambia, Standard Chartered Bank and media organisations.
In 2012, WWF Zambia partnered with Miss Zambia as Earth Hour Ambassador. In her I will If you will challenge, she promised to plant 200 trees if all Zambians turned off their non-essential lights during Earth Hour.   
Since 2012, WWF Zambia Country Office received support and endorsement for the Earth Hour campaign from the nation's energy sector regulator, the Energy Regulation Board(ERB).
Earth Hour 2013 saw the darkening of the Energy Regulation House, a state of the art facility, built and designed to save energy by harnessing renewable energy sources such as natural lighting and solar power. 
2013 also saw the participation and endorsement of the Earth Hour campaign by Arcades Centre Management and Radisson Blu Hotel.
Earth Hour has by 2013 become the biggest campaign for the planet observed by over 7,000 cities globally."  Courtesy of WWF, http://wwf.panda.org/who_we_are/wwf_offices/wwf_zambia_nature_conservation/earth_hour__zambia/

Added to this auspicious occasion, I am introducing a BIRTHDAY TREE for every one of birthdays to come in order to mark this occasion because earth hour almost always coincides with my birthday so I think it's fitting to take that decision, it will be an honour to plant a tree on every birthday to come and if you can, I extend the invitation to you.