Disclaimer: Sadly, I do not own My Little Pony or it's characters. Hasbro does.
Author's note: This is just the short prologue. Also, even though it happened a thousand years ago, I will be using modern terminology because shalt and thy and thou gives me a headache.
"No, I won't!"
Celestia couldn't believe what she was hearing. Luna was standing in front of her, horn raised defiantly, refusing to lower the moon.
"I want them to appreciate my glorious night." Her sister pleaded with wide eyes.
"You know I can't let you do that"
The ponies of Equestria need the sun to grow food and it's part of the balance. A day without it could confuse animals into thinking it was the winter solstice and force them into early hibernation.
The ruler of the day used her magic to wrestle Luna's control of the moon. She won and lowered the celestial body, then raised the sun.
"Fine! See if I care!" Luna stalked off, head bowed.
Celestia could only stare at the retreating figure. Her beloved Luna, the object of all her affection was rebelling. Why? Could she not see that all the ponies saw beauty in the stars? Maybe they slept at night, but sleep is very important. The citizens of Equestria also had campfires at night and enjoyed stargazing.
"I pray she doesn't do anything she'll regret" Was all the eldest princess could hope.