The Boston Harbor Association will hold its annual Boston Harbor Celebration and Auction on Thursday, April 17, from 5 – 8 at the Boston Harbor Hotel, which, along with Legal Sea Foods, again underwrites the gala. This event supports nearly 1/3 of their work to promote Boston’s harbor and waterfront renaissance, support the working port, and prepare coastal neighborhoods for sea level rise. $200 per person (includes beer and wine, hors d’oeuvre, dinner and dessert.) For tickets or more information, contact Executive Director Julie Wormser at 617-482-1722, x 102, or log on to www.tbha.org.