Earth Hour is tonight

Earth  Hour is in about two hours (8:30 p.m. everywhere). Other places have already celebrated.

LONDON (AP) - Europe's best known landmarks - including the Eiffel Tower, Big Ben and Rome's Colosseum - have fallen dark, joining a global climate change protest, as lights were switched off across the world to mark the Earth Hour event.

Millions of people were turning off lights and appliances for an hour from 8:30 p.m. Saturday, in a gesture to highlight environmental concerns and to call for a binding pact to cut greenhouse gas emissions.

Italy's Leaning Tower of Pisa and buildings across Germany and a host of nations went dark. Amsterdam cut the lights at most city buildings .

While France's Eiffel Tower briefly dimmed its lights for security reasons - switching off for five minutes, rather than a full hour - other city landmarks, including the Arc de Triomphe were in darkness for the duration of the protest.

And this guy has a  list of things to do in the dark (wink, wink).