What is the metaphor of sunny day?

It is a metaphor that the development of a situation or event has been helped and supported by God.

Fair weather is an idiom, which means that heaven has done something good, and it is often used to describe the weather and situation that is conducive to the development of something. In an outdoor activity, if the weather is sunny and warm, it can be said that the weather is beautiful, indicating that the weather is very suitable for activities. During the war, the weather suddenly turned bad, which affected the enemy's actions. It can be said that the weather is favorable to us.