i think you should have researched this site before you booked your holiday. i'm assuming that as you are a student and as you have posted in our clubbing section that you are looking for the ibiza which exists only for 12 weeks a year in high summer. for your dates in march from sunday to saturday you'll get to do one night at pacha when it is open, there won't be any hippy markets, a few bars in Ibiza town cater for young people (see posts by mcrackin) and as you're staying in what will be a ghost town with a much reduced bus service (two buses to ibiza town) you'll need to hire a car.
on the other hand, if you like hiking, cycling, sailing, fishing, lazy lunches and dinners in cosy country bars with log fires then you'll absolutely love ibiza in the spring with its myriad of colours and scents.
