Does Onyxia reset every 3 days?

I'm checking my raid info and after clearing onyxia on monday, now it doesn't show on my raid info, is this ok?
PowerRanger wrote:I cleared onyxia on Monday, and today it doesn't show any raid info, that has to be wrong
PowerRanger wrote:I cleared onyxia on Monday, and today it doesn't show any raid info, that has to be wrong