Cambridge, MA. Cambridge will host a celebration of Haitian Flag Day on Wednesday, May 21 at 6:00 p.m. at City Hall. The event will celebrate Haitian culture, a strong part of the Cambridge community. The festivities will include food, Haitian dancers, and other traditions from Haiti. Numerous partners are sponsoring the event, including Mayor E. Denise Simmons, the City of Cambridge, Tele Lakay Mass Inc., Cambridge Health Alliance, BayQuest Realty, CCTV, and LVT Video Productions.