Love oysters? Then this is the time of year for you. Not only is fall considered the time when these tasty shellfish are at their best, it’s also the return of Legal Sea Foods’ sixth annual Oyster Festival. From September 17–October 14, enjoy featured oyster dishes, as well as special events, at Legal restaurants throughout the area. The first event, the “Shellfish Shindig,” takes place September 21 at the Charles Square location in Cambridge (20 University Road, 617-491-9400) from 2–4 p.m. Slurp down $1 oysters at the al fresco Terrace Bar while they last, or indulge in favorites like oyster stew, fried oysters, oyster po’ boys and the ever-popular bacon-wrapped oysters. The fun continues September 23 and October 2 at the Park Square location in Boston (26 Park Plaza, 617-426-4444), where diners can opt for a three-course, wine-and-oyster pairing menu for only $40. Reservations for this prix fixe dinner are recommended.