Long ago, when the world was still young, and magic in its infancy, the moon looked down on the world with a loving eye. The sun had not yet come and all the world was darkness, but for where the gentle moonbeams caressed the surface. The moon was disturbed by what she saw, for it was dark and the creatures of the world needed light, they needed magic, but the magic of the time was unrefined, unusable: the crude stuff of miracles.
The moon realized that magic needed a vessle, a way to cause change rather than to merely exist. She drew upon her will, her power, her spirit and shaped the magic. First, she shaped light, for she knew that her own strength lay within, and not to be shed upon the creatures of the world. The light was a bright orange ball, and it was beautiful, a great glittering orb, the sun. The creatures of the earth blinked, blinded by its beautiful brightness, and knew the warmth of such glorious light. She had created light from the raw stuff of magic, but it had to be controlled, maintained, enforced, and so she drew upon her power again. From deep within her she called the force to shape the magic and created four forms. They were as yet, amorphous blobs, but had within them the power to control the waxing and waning of light, each for a different control.
The moon cast her eyes upon the earth, searching for the perfect form for these perfect magical beaings, when her eyes came to rest upon the ponies of the steppes. The moon admired their strength and solidity, yet also noted their complete grace and so decided upon this form as perfect for her creations. Each of the blobs before her formed into a small horse, a pony, beautiful in all ways and as each pony formed, she took on the colors of the time of the cycle she controled.
"Now," decreed the moon "I shall name you." It was her first vocalization ever, for she had never had anyone to talk to before. "You," she said, selecting the bronze pony with red hair, "You are to be called Aurora, for you control the dawn. You," she said selecting the blue pony with yellow hair, "Shall be named Meridian, for you control mid-day." She selected the next pony, a purple one with blue hair. "You, shall be called Dusk, for you control the setting of the sun." And the moon finally came to the last pony, a pony with hair of black and a body of midnight blue. "You shall be my eternal sister, for you are Nox and are in control of the night."
She set down all the ponies on the land and summoned up the last of her strenght, for she was very tired, and created, on the hind of each pony, the symbol of her office. On the hind of Aurora, the rising sun, on Meridian, the sun in its full glory, on Dusk, the setting sun and on Nox a twinkling star. "Now, said the moon," the last of her strength used, "begin the cycle, circle the spinning world around the sun so that all creatures may have an equal chance at the glorious light that will bring life to them all. Meridian traveled with the sun, Nox with the moon and Dusk and Aurora in between. And so it was, that light and the Temporal Ponies came to the world.