Une Spring 2025 Academic Calendar 2025-26. The university of dayton publishes its academic calendar on an annual basis so our community can plan ahead. 2025 fall 2025 winter 2025 spring 2026 summer 2026;

11:59 pm cst deadline to cancel registration (dropping all spring 2025 classes) for full reversal of tuition and campus fees for classes scheduled in a regular semester. For more detailed information regarding summer.