In 1977 in Moscow during the 11th International Council of Museums conference it was decided to commemorate the International Day of Museums. Since 18th of May, 1978, the festival is commemorated in 150 countries. In 2005 the International Museum Community Campaign "European Night of Museums" was organized and Lithuanian museums joined it. The aim is to show the exhibits at night when museums are usually closed, and introduce museums to different communities. On this day, visits to the museums and various are events free.