International Museum Day is an international day held annually on or around 18 May, coordinated by the International Council of Museums. The event highlights a specific theme which changes every year to reflect the basis of the international museum community's preoccupations.
Thanks to Google Arts & Culture, you can still celebrate International Museum Day and "go to the museum" without having to leave your house! The collection of locations includes places like the British Museum in London, the VanGogh Museum in Amsterdam, and even The Met! There are literally hundreds of destinations where you can virtual tours of some of the world best museums and see thousands of pieces of art and history online. You can even use Google's Street View to tour the Guggenheim's famous spiral staircase in New York without ever leaving the couch!
See it for yourself at https://artsandculture.google.com