Iftar is the first meal after fast , the fast break (in Qatar Iftar starts around 5:30 pm).
Sohour is the last meal, before fast , early in the morning.You have to finish eating before sunrise, which is in Qatar around 5:20 am.
If you want, you can check the exact time here:
http://www.islamicity.com/PrayerTimes/

We went to InterCon tent, and it was amazing. I have never seen such a good service in Doha since I came here about 9 months ago! And decoration is very nice. A music band and a singer are also very good. Recommended!