Juneteenth celebrates the day in 1865 when word of freedom spread to the last people who were enslaved in Galveston, Texas under the Confederacy.Here in San Diego, festivities are well underway — with lots in store this weekend. Juneteenth celebrations are happening across the county, with everything from music performances to surf lessons.On KPBS Midday Edition, we sit down with two local event organizers to give us a preview of upcoming events celebrating the holiday. We also talk about the meaning of Juneteenth and the importance of community.But first, Onstage Playhouse is opening a new play next week called "Isaac's Eye" about renowned scientist Isaac Newton — who made significant contributions to physics, mathematics and astronomy.Plus, our preview of local arts events happening this weekend.Guests:Loren Cobbs, founder, SD MelaninAiyana Reissman, program manager, Paddle for PeaceJames P. Darvas, artistic director, Onstage PlayhouseJulia Dixon Evans, arts reporter, host of "The Finest" podcast, KPBS