From the Secular Celebrations website:
"Sunshine Week is an important event for the entire American population. Starting with Freedom of Information Day on March 16, James Madison's birthday, Sunshine week focuses on open discussion and open government."
I'd be curious to know of similar observances in other parts of the world.
I'll celebrate it by going outside - IN THE DAYTIME! :O
*I hate sunlight but Sunshine Week sounds great... too bad they won't disclose anything of importance.*