Need help with 24 Hour timing script.

Im not asking anyone to write a code for me before anyone thinks this, I already have a timing script that counts the hours and resets at hour 23 to 0.

Im asking for what the code snippets for changing the scenes ambient lighting and skybox setting, so I can insert them at appropriate times for the times of the day.

I dont know them

 var Hour = 0;
 
 function Start () {
     InvokeRepeating("time", 0, 60);
 }
 
 function time () {
 
 
  Hour = Hour + 1;
 
 }
 
 function Update () {
 
  if(Hour > 23){
  Hour = 0;
  }
  
  guiText.text = ("Hour:"+Hour);
 }

this is the code for anyone wondering.