Energy Vacation - an idea for Lent?

This idea -having period of time when you aim to consume nothing or the barest minima of minima; "During your "vacation", turn off your thermostat, refrain from using any lights and use electricity only sparingly - i.e. to keep food from spoiling. No driving. No TV. And, yes not even any blogging or 24 hour news updates.". It looks like an idea to suggest for Lenten discipline say on Wednesdays and Fridays (the traditional fast days from of old).
Treehugger: Energy Vacation - The Zen of a Reduced Ecological Footprint