There are so many incredible mysteries that we see in the Bible. History has shown the validity of some of the most amazing prophecies in the Bible. It makes it unnecessary to find anything outside of what the Bible teaches in order to get amazed, but from time to time things pop up that still blow our minds.
The Bible has always worked on a 360-day prophetic calendar. If you were to view the life and death of King David and compare it to the life and death of Yeshua (known by most Christians as Jesus Christ) and view it through the standard Gregorian calendar. you find something extremely interesting.