INSPIRING
The Earth Hour tone-of-voice is actiondriven, empowering and inspiring. It is
essential for the language to be human,
hopeful and locally relevant.
GRASSROOTS MOVEMENT
Communities around the world are the
lifeblood and grassroots of the Earth
Hour movement. They have the freedom
to localise Earth Hour.
OPEN-SOURCE MODEL
Earth Hour is one of the first open-sourced
environmental campaigns. It belongs to
the people. Any individual or organisation
can use Earth Hour to organise their own
environmental campaigns and activities.
TIMING
The Earth Hour event is held worldwide on a
Saturday, 8:30pm at the end of March. This
time allows for near coincidental sunset
times in both hemispheres, enabling the
biggest visual impact of lights out around
the world.