Do you have to go to college every day of the year?
Oh no! College/University has Semester or Quarter breaks, vacations, snow closings (not made up days), etc. Plus, unless you must be Full Time for Grants and Loans, you don't need to attend every Semester/Quarter. Part-Timers might attend evenings only. Most full time students attend Fall, Winter, Spring, and are off for the Summer term. But it is very individualized, for example students can attend in the summer if they want.