Cornell organizes its academic year into three primary semesters: Fall, Spring, and Summer. The Fall semester normally begins in the last week of August and runs through mid‑December, while the Spring semester starts in early January and concludes in early May. Summer is split into two shorter sessions—Summer Session I (late May to early July) and Summer Session II (mid‑July to early August)—each lasting about six weeks.
Knowing these dates matters because they drive registration windows, financial‑aid disbursements, and campus life events. For example, the official registration deadline falls a few weeks before classes start, and grade‑posting dates are tied to the final exam schedule. By aligning personal plans with the calendar, students avoid last‑minute surprises and can make informed decisions about coursework and extracurricular commitments.