Earth Day 2006 Official Program This article was published on 04.20.06 Program of Events List of Participating Organizations Yesterday’s office technology brings landfill problems today Car display showcases the latest green-vehicle technology Behind the Earth Day curtain More Guides » Earth Day ECOS Earth Day 2004 UPDATE Published on 04.22.04 Exploring Sacramento: The Valley’s Natural Wonders. Published on 04.22.04 Earth Day Celebration Official Program Guide. Published on 04.22.04 Earth Day Celebration Official program guide. Published on 04.22.04