My daughter told me about this and thought we should let everyone know:
Earth Hour 2013 is at 8:30 PM - 9:30 PM on
Saturday, March 23Earth Hour is the single, largest, symbolic mass participation event in the world. Born out of a hope that we could mobilize people to take action on climate change, Earth Hour now inspires a global community of millions of people in 7,001 cities and towns across 152 countries and territories to switch lights off for an hour as a massive show of concern for the environment.http://www.earthhour.org/Hey Bob: Not sure how many people will get the message, but this may make for an interesting photograph.