Hmm those times seem a little odd - firstly xc won't take 13 hours, and secondly, they're only four hours behind us, with sunset before 6pm their time, they won't be xc-ing in the dark!
ETS: Olympic schedule has xc between 2pm and 7pm our time.
Op - the actual timings will no doubt come out this week - remember the Olympics are filmed by the Olympic broadcaster, BBC merely have the rights to show it so assume they're still finalising it all.