Each year on March 28th at 8:30pm, Earth Hour encourages individuals, businesses, and cities around the world to turn off non-essential lights for one hour to raise awareness about protecting the planet. Major companies like Verizon, Google, Ghirardelli Chocolate, and Timex have participated by dimming or turning off building lights and digital displays. They also promote Earth Hour to employees and customers. Participating helps spread the message of sustainability and companies can further support conservation through partnerships with WWF.