First Day Of Fall 2025 Calendar. This date marks the autumnal equinox, a significant point in the yearly cycle. This date marks the moment the sun crosses the celestial equator, heading.

The yale college calendar provides critical information regarding activities and holidays during the academic year. Use the official academic calendar to find out the most important dates—including the first day of class, the last day you can drop a class with an automatic w, refund dates, and more.