[Modding Question] A few questions

[FueledByOCHD]

So I am completely new to posting here, and modding Rimworld.
I am trying to figure out how to effectively add an extension to the time system for use with a fantasy based mod based on some of the lore for a book i am writing. So here is how i am planning this

If you select the mods Scenario,
      Then (enableRORCore){

}
else (use original time system)
{

}

The problem I am having is that i can not quite figure exactly how i would go about overriding the text display in game to show the custom text of the Mod specific time display?

Can anyone point me in the right direction, or if this is even possible.

I currently have harmony, Assembly-CSharp, and UnityEngine  as a dependency for my mod Assembly, And I have a mid-grade understanding of c#.