In Indiana, it's because of "e-learning". State law requires 180 days of school. They used to have to make it up after Memorial Day if they burned through their built-in snow days (i.e. President's Day). Now, with every kid having a school-issued ipad, they can count snow days as e-learning days. In fact, on a Zoom meeting right before GHDIII, our local school Superintendent proclaimed, "Thank goodness for e-learning days!"