Is there a low performance way of making a day night cycle for mobile?,

I just recently started with Unity and developing and it is a very interesting journey so far. For the idea I wanted to create I wanted to have a day night cycle (on mobile phones). However after reading several tutorials and guides it seems relatively performance intense because light will be recalculated every frame.

Since mobile is already a bit tricky on the performance side of things, is there a way how to make a night day cycle without having a big decrease in performance?

And if yes, if there are any tutorials could someone maybe link them so that I can check them out? (articles, videos, what ever you can give me I soak it in :D ) ,