MUSEUM DAY (SHOULD BE EVERY DAY)

Every year since 1977, International Museum Day is held worldwide sometime around May 18. This year, more than 30,000 museums are getting ready to celebrate the event in around 100 countries on the five continents!
http://icom.museum/press-releases/press-release/article/international-museum-day-2013-museums-all-over-the-world-have-the-place-of-honour/