This has been discussed many times on the forum. You can use the search function, or this as a starting point http//www.free-minds.org/Old/articles/science/timing.htm Personally, I'm not convinced of any theory as yet with regard to timing. Here is an article I also recommend http//mypercept.co.uk/articles/meaning-hajj-Quran.html

Ask God... He will give you the answer.. Yet sometimes, His answer is not suitable to your liking and / or assumption... Sometimes "God" will test one's intelligence too...