Martha's Vineyard Glass Works Glass Friday Sale starts Friday, Nov. 29 and runs through Sunday, Dec. 1. 10% off in-store and online purchases, plus special in-store  offers every day of the sale. Friday the 29th, MVG will hold special hours opening at 2 to 6 p.m. with glass blowing demonstrations begining at 3 p.m.. Stop by for hot cider, hot glass and our biggest sale of the year!