Ecc 9:10-11 Whatever your hand finds to do, do it with your might; for there is no work or device or knowledge or wisdom in the grave where you are going. 11 I returned and saw under the sun that—The race is not to the swift, Nor the battle to the strong, Nor bread to the wise, Nor riches to men of understanding, Nor favor to men of skill; But time and chance happen to them all.
Understanding the time or discerning the time is to know what to do in a given point of time and it is not about knowing when that time will happen. Time and chance happens to all, and to know what we have to do when the time and chance hits us is the discerning of the time. King Solomon talks about life and death in this chapter. He wants the sons of men should discern what they have to do when there is life and before death hits them. In the time of our life, we do take each matter and judge what is right or wrong and then decide to execute that task. Like for example when we attain the time of marriage, we look for our partner and judge who is best suited and then decide to live together. So in that time span we do according to the ways of man. This is the understanding of our time when we are living in this earth and those things which is under our ability to execute.