Definition
This idiom is used to emphasize that time passes continuously and cannot be stopped, therefore one should act promptly and not delay.
歲月不待人；時不我待
We need to start this project right away; time and tide wait for no man.
我們需要馬上開始這個項目；歲月不待人。
Stop procrastinating, time and tide wait for no man, we need to make a decision now.
不要再拖延了，歲月不待人，我們現在就需要做出決定。
Since the opportunity has arisen, seize it, because time and tide wait for no man.
既然機會已經出現，就抓住它，因為歲月不待人。