The Washington State Developmental Disabilities Council (DDC) has a long and proud history of advancing inclusion, equity, and opportunity for people with developmental disabilities and their families. This timeline highlights key milestones, influential people, and pivotal moments that have shaped the Council’s work and vision over the years. From advocacy led by self-advocates and families to legislative achievements, community partnerships, and systems change efforts, each entry reflects how people, ideas, and collective action have helped move Washington toward stronger, more inclusive communities.