Spring Summer Calendar 2025. The spring period spans the following 4 months: The arizona state university academic calendar outlines the dates and deadlines for fall, spring and summer classes.
The schedule of classes for summer 2025, fall 2025, and spring 2026 is available. Summer 2025 starts on friday, june 20th in the northern hemisphere, with the first day of summer being the longest daylight day of the year with the earth’s axis having reached.