YOLO COUNTY COURTHOUSE. Indivisible Yolo and Sister District Yolo invite residents across Yolo County to join its countywide, family-friendly “NO KINGS” march and rally in downtown Woodland. It will take place alongside more than 1,300 NO KINGS events across the state and country to protest the Trump administration and authoritarian rule on Flag Day. 10a—12p. Free

NEVADA COUNTY FAIRGROUNDS. The 50th annual Father’s Day Bluegrass Festival — the landmark golden anniversary of this family-friendly celebration of bluegrass music. The four-day event, staged by the California Bluegrass Association, features over 30 national, regional and local acts, workshops, jamming, square dancing and youth activities, all taking place under the towering pines of the beautiful Sierra Nevada foothills. Fri-Sat, 9a—11p & Sun, 9a—5:30p. $35—275

CENTRAL PARK. Two free sets of Big Band, Swing and Latin jazz standards amidst the splendor of the Davis Craft & Vintage Fair (which runs 10a—4p). 11a—1p. Free