Spring is underway, and for those still shaking off the weight of the Vineyard winter, the Unitarian Universalist Society of Martha’s Vineyard is hosting a daylong meditation retreat with Mark Hart, on Saturday, May 1, from 10 a.m. to 4 p.m. at the society chapel on Main street in Vineyard Haven. Mr. Hart, founder of the Bodhisara Dharma Community and adjunct religious advisor for Buddhist students at Amherst College, will lead participants through alternating periods of meditation, silent walking and teacher-led exploration. Bring a bag lunch. Registration is $20 in advance, or $25 at the door. Free will offering for the teacher accepted. For details, call 508-693-2827, or e-mail jscotrice@gmail.com.