2025 Summer Calendar Dates Dates. Last day to change major for the summer 2025 term. This online date calculator will help you calculate how many days are left until any holiday.
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 its furthest tilt and begins to change directiion back. View the online academic calendar to get familiar with start dates and registration deadlines at university of maryland global campus.
