DATE AND TIME Saturday 24 May 2008 to 930 hours on the first call and 10 hours in the second in the Plenary Hall of the City of Beasain

What is the correctly punctuated version of this sentence?
DATE AND TIME: Saturday 24 May 2008, to 9,30 hours on the first call and 10 hours in the second, in the Plenary Hall of the City of Beasain.