Friday, March 13

• Bill filing deadline for the 84th legislative session
• San Antonio mayoral candidate Mike Villarreal fundraiser; 23 Palace Place, San Antonio (6-7:30 p.m.)

Sunday, March 15

• U.S. Sen. Rand Paul, R-Ky., SXSW interview with Tribune Editor-in-Chief and CEO Evan Smith; 110 E. Second St., Austin (5 p.m.)