My advise to you is to get there early (if you are a regular ticket holder) or risk to be in line for long time, and do no complain afterwards that you were not warned.
The time-slots are as follow:
TranceRoom: 9:00pm-11:00pm: Malek, 11:00pm-12:00am: Raneem, 12:00am-2:00am: Cosmic Gate, 2:00am-4:30am: Sander Van Doorn, 4:30am-7:30am: Above & Beyond, 7:30am-10:am: Markus Schulz, 10:00am-12:00pm: Ben Gold.
Mainroom: 9:00pm-11:00pm: Uppercut, 11:00pm-12:00pm: MS, 12:00am-1:00am: Hardwell, 1:00am-4:30am: Tiesto, 4:30am-6:00am: Avicii, 6:00am-8:00am: AVH, 8:00am-9:30am: Freemasons, 9:30am-10:30am: YY, 10:30am-12:00pm: N. Shepard Sultan
Have fun, dress in white even if you shouldn't, and be safe. I want to hear all about it in a couple of hours.