Changing skyboxes?

Hi, i wanted to implement a day and night system in my game, but i also wanted to have a skybox, so that the sky didn’t look like one plain color. So would a simple way to go about this be just scripting something to make the fog get gradually denser and darker, simulating a day and night effect? Or could i use a similar system to swap between like 7 different skyboxes, which would look like different times of the day? If there is, is there a way to make them fade gradually, so it isn’t obvious that the texures are just being swapper?
Thank you so much, I realize that this maybe a novice question.

It doesn’t matter that it’s a novice question. What matters is that it’s been answered several times before.

Like here: Day/Night Skybox - Unity Answers

Or here:

Or here: Galawana Studio » Unity3D : Day Night Cycle and Transition

Or here: LMGTFY - Let Me Google That For You