 Something fundamental here, which is restricting speech because of the viewpoint of the speaker is kind of a core free speech evil. Restricting speech because of the content of speech, even if not the viewpoint, that's bad too, not quite as bad as viewpoint. Content-neutral restrictions are just fine. So if you say, we're not going to have speeches in the month of December, let's say, because it's time for studying, not going to speeches,