A day night cycle in the end dimension

There would be different celestial bodies than those in the overworld, perhaps even different things than just day and night, but there would be a cycle. This cycle might only start once the dragon has been defeated, further building on the concept of the "free the end" achievement. There would NOT be a nighttime that can be skipped with beds neither am I suggesting we should be able to set our spawn in the end. I respect those design choices.