Port Jefferson goes back in time for the Charles Dickens Festival. Street performers, trolley rides, house tours, an old-fashioned marketplace and a Beggar's Ball round out the event. 4:30-10:30 p.m. Friday, 10 a.m.-10:30 p.m. Saturday, 10 a.m.-6 p.m. Sunday. ADMISSION Free (Beggar's Ball, $20; $5 for 16 and under). Info at 631-473-5220, gpjac.org.