For stuff that you really care about, you pass regulations that public institutions have to follow. This takes care of stuff like school hours, counter opening

For stuff that you really care about, you pass regulations that public institutions have to follow. This takes care of stuff like school hours, counter opening times, mass transport time tables and the like. The rest of society either adapts or doesn't care. Some businesses, especially if they are outdoors-related, already have different opening hours in summer and winter. It really doesn't have to be legislated on a large scale.