During first and second year, we get three weeks for christmas, and one week for spring break, either in late march or early april. Summer between first and second year is five weeks long. However, after finishing second year, all bets are off. No more summer, winter break is maybe one week, and no spring break. However, from what I hear you get lots of time off during 4th year for interviewing and doing optional away rotations. So all you have to do is survive the hell that is third year and you're home free.