What do you mean it will be sunny tomorrow, and everything will be fine when spring comes?

From "Songs handed down from ancient times: A Brief Comment on the Fate of People Born in March of the Lunar Calendar", fortune-telling statement, what does this mean? It's not just what people say, as long as they can justify themselves.

However, literally, it means that on a light and sunny day (Qingming, April in the solar calendar and March in the lunar calendar), spring comes and plants and trees begin to grow.