* The specific college or university: Different institutions have different academic calendars.
* The type of semester system: Some use semesters (fall and spring), others use quarters (fall, winter, spring, summer), and some have other variations.
* The location of the college: Schools in different countries or even different regions within a country may have different start dates.
To find out when the next semester starts, you need to specify the college or university you're interested in and check its official website, usually in the academics or registrar's office section.