Cannot seem to find

So, I remember way back when I was working on a previous mod that there was an system that I used, which was basically trigger based and would only be activated depending on the time of day.

What I kinda want with this mod is to have the same system but I cannot seem to find it. So can anyone recommend me one?

What I want:
trigger based spawn system based on time

thanks in advance! <3


thank you! <3