Your schedule start times depends on the courses you choose. For core classes, there are usually multiple offerings of the same course by different professors at different times of the day. So if you want to start at noon as a freshman, you probably could if you design your schedule for the semester that way.

For upper level major-specific courses, if it’s a small to medium sized program these may be offered once per semester or even once per year, so you’re much more at the mercy of the professor’s schedule.