Why does cloudy day affect mood?

Many people will feel very comfortable and happy when watching sunny days, but on the contrary, they will feel very depressed, annoyed and sad! Presumably this has something to do with everyone's ideological character and way of thinking! When the weather is good, the sky is mostly bright, otherwise it is dark, and people's feelings about color are similar! From a macro point of view, people still yearn for light and oppose darkness! From a microscopic point of view, sunny weather can do more things, and vice versa!