Summer is still a popular time for family vacations, and most school districts have a 2 or 3 month summer vacation. K-12 school years typically run from late August or early September until May or June, depending on the length of the year and number of holiday, vacation, and snow days occurring during the year. The year is divided into two semesters, three trimesters or four quarters, typically with a report card issued to students' parents at the end of each.