Museum day is this Saturday Sept 17th. If you would like to visit a participating museum you must download a ticket.
To see which museums are participating and to get your ticket use the link

Some of the area museums that are participating include:

American Museum of Ceramic Art
Pomona, CA

Moulton Museum
Laguna Hills, CA

Museum of Latin American Art
Long Beach, CA

San Diego Archaeological Center
Escondido, CA