Hey Magdalena,
Have been to Austria! It was a long time ago though. The Military Tattoo is on when you're there, and the Fringe Festival stars then also. If you google 'edinburgh festivals' the first hit will be a site with all the festival info. And when you're in Scotland you should visit the Highlands (see my blogs - there's one from there). Any other questions let me know.
Colm
PS - did you download your free guide for Edinburgh?