I found out about this about 6 months too late to participate this year. Looking at their gallery of images made me want to dust off my old pinhole camera for next April. Definitely worth a look. Of course, any of those images would look great as a big print.
The last Worldwide Pinhole Photography Day was celebrated around the planet on April 30, 2006. Visit the gallery to view the pinhole photographs taken on that day from participants around the world! Worldwide Pinhole Photography Day – home