What does the due date of a cow teach about God's timing in creation?

Les explains that as a rancher he watches the due date of mama cows, hoping to be aware of when they are about to deliver their calf. He calls that due date one of the miracles of God’s creation, because everything is on His timetable. If you know the day of conception, you can almost tell within forty-eight hours the day of delivery. Paul then uses that illustration of delivery and due time to describe seeing the resurrected Lord as a Jew born before the due date. Les also connects it to the coming day when the nation of Israel will be born all at once, in a day. They could have experienced that national spiritual birth at Christ’s first coming, when He presented Himself as the King of Israel and performed signs to prove who He was, but they rejected it.