March 23. 2011 – Hilton Worldwide announced that it intends to turn off the lights at thousands of the hotels on Saturday to recognize Earth Hour. From 8:30 p.m. to 9:30 p.m. local time, hotels in the company’s 10 distinct brands will switch off main building exterior lighting and rooftop signage, shut down business center equipment and dim interior lights.

Excerpt from:
Hilton Hotel Brands Will Turn Off Lights for Earth Hour

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