In the United States, the duration of an academic year, encompassing both instructional and non-instructional periods, varies among states. This pivotal aspect of education forms the cornerstone for student growth and relative achievement milestones on their academic journey. The number of necessary school days by states influences not just the students and educators, but also the local economies and the daily lives of communities.
Quantifying instructional time is complex. It is influenced by various factors, including geographical region, local traditions, holidays, weather-related closures, and even dedicated teacher development days.