Today’s edition is really a call to action, one very simple yet very important action — switching off your lights for an hour tomorrow night. Because tomorrow, March 28, between 8:30PM and 9:30PM local time (whatever your locale), is Earth Hour.

Earth Hour is a global sustainability movement ignited by WWF. It began two years ago in Sydney, when 2.2 million homes and offices switched off their lights for one hour in an effort to raise awareness about the urgency of changing our daily habits in order to combat climate change. By 2008, 50 million people had joined the movement. Iconic landmarks like the San Francisco’s Golden Gate Bridge, Rome’s Colosseum, the Sydney Opera House, and the Coca Cola billboard in Times Square all stood in darkness.

This year, Earth Hour stands for something much bigger — a global vote for change, aiming to draw 1 billion people into the voting booth that is the light switch. Although this is political, it’s not about national politics — it’s about planetary politics.

The propaganda materials for this year’s event were designed by none other than Shepard Fairey, whom it’s no secret we respect on more levels than we can count.

The effort, dubbed VOTE EARTH, is a global call to action for everyone — every office, every housewife, every partygoer and bookworm and sheep herder. Over 74 countries and territories have pledged their support to VOTE EARTH, with anyone from the UN Secretary General to Edward Norton to Linkin Park endorsing the effort and urging us to join in.

So here’s what to do:

• Sign up — commit to make your planetary vote count.
• Tell your friends — darkness is always more fun in company.
• Make an event of it and, really, have some fun with it — take photos, make a video, follow Earth Hour on Twitter and tag any of your related tweets with #earthhour or #voteearth and your #location.

That’s it, it’s that simple. So, um, just do it, willl ya? We ceartainly will.