Eights Week, also known as Summer Eights, is a four-day regatta of bumps races which constitutes the University of Oxford's main intercollegiate rowing event of the year. The regatta takes place in May of each year, from the Wednesday to the Saturday of the fifth week of Trinity Term. Men's and women's coxed eights compete in separate divisions for their colleges, with some colleges entering as many as five crews for each sex.