Plano ISD students will begin classes for the 2019-20 school year Aug. 12 and break for summer May 22, the week before Memorial Day. The board of trustees approved the 2019-20 instructional calendar at its regular meeting Jan. 15. Trustees were presented with two draft calendars with differing start and end dates. The district’s winter break will begin Dec. 20 and end Jan. 6, and the school year consists of 177 instructional days. See the calendar adopted by trustees below: