Well i found out this LOL moment while watching "The Cutie Mark Chronicles" When Rarity gets her cutie mark she said the play was the next day, yet when looking closer her horn led her for the rest of that day and one night going at one flat speed. Now how long would it take with no food or water to get back to her home? How did she even have time (if she made it home in time) to get the dresses finsihed?