"Timing is everything." It's an old adage, and certainly guilty of overstatement. Yet, the Bible affirms the benefit of timing things well. For instance, Solomon reminds us that "A person finds joy in giving an apt reply - and how good is a timely word!," (Proverbs 15:23). Think of how good, "Will you marry me?" fits when it is spoken to the right person at the right time.
As good as humans can be at saying or doing the right thing at the right time, God is infinitely better. While God is not limited by time or space, He is by no means unfamiliar with the concept of time. He invented time, and the progression of moments serves Him and His purposes.