Olympia Harbor Days Thursday, September 1, 2016 10:00 PM 22:00 Saturday, September 3, 2016 11:00 PM 23:00 Google Calendar ICS Olympia Harbor Days-Olympia , WaGreat event. One of the most crowded events in Olympia, Wa. A lot of interesting vendors and many smiles on people faces. There are boat shows, entertainers, music and about 15 food vendors.