More than 150 cities – including Amsterdam, Buenos Aires and where it all got started in 2007, NYC – are participating in INTERNATIONAL PILLOW FIGHT DAY! Bring soft pillows, swing lightly and take off your glasses, because bad behavior and love taps may ensue in this pillow battle that celebrates public spaces. Make new friends or lovers after thoroughly beating them to a pulp at the gathering lovingly reprised annually since its inaugural year. Massages by Muscle Relaxers available. Free. 3 p.m. Freedom Park, North and Moreland avenues. www.freedompark.org.