Hillcrest retirement community hosts a free summit, “Flourishing in Challenging Times,” from 10 a.m. to 2 p.m. Thursday, April 9 at its meeting house, 2750 Mountain View Dr., La Verne. Claremont Graduate University professors Stewart Donaldson and Saida Heshmati will speak on the science of well-being. The event also includes workshops and panel conversations organized by CGU’s Claremont Flourishing Center. Call (657) 279-4495 or visit livingathillcrest.org/events to RSVP.