Worldwide Pinhole Photography Day is Sunday, April 28, 2013! On this day, people all over the world celebrate the magic of pinhole photography by making pictures with what the artist Christopher James called "a box of air."
The Worldwide Pinhole Photography Day website has tons of resources, including information about how to participate and listings of WPPD events around the world - including workshops at Looking Glass Photo in Berkeley and RayKo Photo Center in San Francisco. The WPPD site also includes a gallery of one photo per artist made on WPPD - you can see the 2012 gallery here.
I will be celebrating WPPD this year by making pinhole photos (of course), and by attending the opening of the 4th Biennial Juried Pinhole Photography Show at RayKo Gallery, which includes one of my photographs (details to follow soon).