 For example, in the Northern Hemisphere they often begin in late August or early September of year one and continue until May or June of year two, with a three to four month summer break in between years one and two.Students enter with a reasonable amount of prior real-world work experience and take classes during weekdays like other university students.A typical full-time, accelerated, part-time, or modular MBA requires 60 credits (600 class hours) of graduate work.