every dog has his day 凡人皆有得意日;人人皆有得意时;人皆有出头日;人皆有得意时;时来运转

【例句】
They say that every dog has his day; but mine seems a very long time coming.
俗话说：“凡人皆有得意日”，可是我的得意日好像老是不来似的。

Just take it as a process of preparation and accumulation and believe every dog has his day.
就把它当作是个积累和准备的过程，并坚信人人都有出头之日。