Bermuda residents will be encouraged to turn off their lights for an hour, joining millions around the globe to celebrate Earth Hour.

Environmental group, Greenrock, want locals to mark the occasion on March 25 “to highlight the global challenges of environmental sustainability.”

This year’s theme is “Keeping up with Climate Change”.

“This action will partner you with millions of other people around the world in support of Earth Hour’s mission,” said a Greenrock statement.

“During that same evening, Greenrock will be celebrating with a free community event at City Hall, including a 5k Glow Fun Walk and Run throughout the streets of Hamilton.

“Greenrock encourages everyone to sign up for this fun, non-competitive activity, perfect for the whole family. Your registration will support Greenrock’s efforts to raise awareness about environmental issues throughout the year. We hope to increase the numbers from last year’s event, with a goal of at least 1,000 participants.”

On the same day, Greenrock will also be holding a Living Green Expo from 9am to 6pm at City Hall.

Volunteers for the walk and run are needed and those interested can sign up at https://runsignup.com/Race/Store/BM/Hamilton/EarthHourBermuda5KGlowFunWalkandRun.