A Professional Activity (PA) Day in Ontario is a school day when students stay home while teachers participate in professional development, planning, or administrative activities. Other provinces use similar terms like Professional Development (PD) Days. PA Days occur several times throughout the school year as scheduled by school boards. While education is provincial jurisdiction, PA Days significantly affect municipal communities as parents arrange childcare and recreation programs see increased demand. Municipal recreation departments often offer PA Day programming to support working families. PA Days demonstrate how provincial education decisions create ripple effects requiring municipal and community responses.