It wasn't easy being the ruler of a country, Celestia could attest to that. Being a ruler was so hard, she had to take a vacation every three months. During those three months she would travel around Equestria, stalk—er, watching over her little ponies and making sure they were trotting on the path of truth, virtue, and harmony. 'Twas her duty, after all. She watched over her ponies during the day, and Luna watched them sleep at night and occasionally invaded their dreams—to improve their quality of life, of course.