Columbia University structures its year around four primary periods—Fall, Spring, Summer I, and Summer II—each with defined start and end dates, a registration window, and a set of official holidays. The university publishes these dates well in advance, allowing students to map out coursework, exam preparation, and extracurricular activities across the entire academic year.
Beyond the core semesters, Columbia also provides mid‑term breaks, reading periods, and exam weeks that shift slightly each year. Knowing these nuances helps you anticipate when libraries are busiest, when campus housing contracts reset, and when tuition payments are due, reducing last‑minute stress.