Get tax help every Friday thru April 12 on a first-come first-served basis. 1-3pm at Annapolis Library: 410-222-1750; www.aacpl.net. 

  Dress in your summer white for live music, dancing, food, palm trees, an open bar and silent and live auctions at Save the Coconut’s Coco Blanco, a festively fun ball to benefit local breast cancer organizations including METAvivors, Relay for Life and Wellness House. 7-11pm at Loews Annapolis Hotel. $75. rsvp: 410-353-1522; www.savethecoconuts.org. 

  John Wennersten talks evolution of the state’s oyster industry from the colonial period to the mid-20th century, detailing the rise of the oyster from a poor people’s food to a delicacy. 7pm at the College of Southern Maryland’s Prince Frederick Campus, off of Rt. 231: 301-934-7827; www.csmd.edu/arts.

  Supporters of Gov. Martin O’Malley’s public safety proposals bring homemade signs to rally for gun-violence prevention before the first legislative hearings on the bills. 10:30am at Lawyer’s Mall, State Circle and College Ave., Annapolis. rsvp: www.marylanderstopreventgunviolence.org.