As I said, the fact of a cycle isn't evidence that you're in a certain point in that cycle. 10 am comes every day, without fail, but that's hardly proof that it's 10 am right now. Saying "there's a cycle," doesn't actually explain anything unless you can give evidence to show that we're in a certain point in that cycle. Otherwise, all you're saying is the logical equivalent of "There are clocks, therefore it's 10 am."