That was one of the most memorable days in Celestia's life. Since that long-ago era, much has changed. The ponies now lived together in harmony in Equestria, and began to slowly build their small settlement, which they called "Ponyville". Because of the fertility of this land, the old cities, like "Apple Loosa" and "Cloudsdale" could be rebuilt. The Harpies lived separately since they leaved, but they also transformed after the spell, now they looked like Griffons and until today they are living in their kingdom and in their village “Griffonstone”. However, their character was still so mean and greedy, as you knew it from Celaeno. Mabruk appeared after a long time, his power has become very strong in the years of his absence. But he came back with evil intention and spread his pranks and jokes all over the world. He called himself ‘Discord’, God of chaos. Celestia and Luna could not protect Equestria from his chaos and they couldn't banish him, because ‘Discord’ was now too powerful for them. When Celestia and Luna were seeking for a counter spell, Mabruk crashed as Discord Equestria into chaos. The princesses finally found a way to stop him, the "tree of harmony" should restore the balance of peace in Equestria and stop ‘Discord’. Now that the portal in the "Castle of the two sisters" was connected to the human world, Celestia and Luna had to search for another way to the ‘tree of harmony’. On their search after the tree, discord turned the “Everfree Forest” into a crazy place full of dark creatures, which had the task to divert Celestia and Luna from reaching the tree. After some effort and many scratches, they managed to get the element stones from the tree of harmony.
Celestia remembered when she saw the tree with Schmendrick for the first time.
Only those whose souls are found to be worthy will mark the trunk of that tree and would be marked as well. They will be marked as something special, a harmonious connection.
Then following happened: Celestia and Luna noticed that the symbols of a sun and a moon appeared on the trunk of the tree. The same was happening to Celestia and Luna. The symbols appeared on their fur on their rear body. They were now marked from the tree and got the elements of harmony. With the elements they succeeded to stop discord's machinations by petrifying him. All celebrated the triumph over discord and Celestia as most powerful alicorn. Luna was moved more and more into the background. But Celestia recognized too late that Luna was much suppressed about this, but Celestia never took the time to talk to Luna about it due to her responsibilities. This grief turned in anger and hate over the years. Suddenly Luna place herself in the foreground, after years she disappeared in Celestia's shadow, didn’t lower the moon, so Celestia couldn’t raise the sun. Celestia didn’t appreciate this desperate cry for attention and ordered Luna to stop her actions immediately. Celestia threatened her sister, for the benefit of all unicorns, to impeach Luna of her task and would take care of the daytime by herself. Her anger turned Luna in one of the darkest creatures, in which an alicorn could turn. She got powerful dark forces with which she wanted to rule over the ponies. She called herself "Nightmare Moon", but before she could inflict damage however, Celestia had to protect her kingdom and used the elements of harmony against Nightmare Moon. The power of Nightmare Moon was so strong that a reverse transformation into Luna was not possible yet. But Celestia didn’t want to petrify her because inside she was still her sister Luna after all. Therefore she banished Nightmare Moon for 1000 years on the Moon, because under normal circumstances a alicorn could survive a very long without any problems and that should give Celestia plenty of time to find a solution. Celestia remembered that Luna always liked the Moon so much and probably the dark power would drain after 1000 years away from her and she would come back as her little sister Luna. If this wouldn’t be the case, so at least the power of Nightmare moon would no longer be sufficient enough to protect her from a reverse transformation with the help the elements of harmony. At that point Celestia stopped to write the "Journal of the Two Sisters" further.
Since this event, it was unsustainable for Celestia to live in the "Castle of the two sisters" anymore. So she left the elements of harmony in the throne room of the Castle. The elements fossilized to protect themselves and remained standing as a statue in the Castle. Celestia only took the portal to the human world with her, hoping to hear something from the other side someday. However, it was time to find a new home. The ponies were of the opinion that as a princess Celestia must live in castle. So they built for their Princess on the big mountain over "Ponyville" a great castle after Celestia's proposals. Certainly, many of the ideas of Celestia came from King Haggard’s old castle, because she did not know how a castle should look in any other way, the only castle she also reminded was the "Castle of the two sisters". Later, the castle was finished and looked very good to Celestia. Sure, the castle still reminded Celestia of Haggard's Castle but now his era was completely wiped out and so she could confidently move in. But to the Princess it was important to have contact to their ponies and so she also let build a small town, which was now known under the name of "Canterlot". Celestia kept the portal in the cellar of the castle. The portal to the human world still worked, but Celestia had never the opportunity to enter the portal. The responsibility here in Equestria over time was simply too much. And since the story with Luna happened she had to take care of everything. Lir, Schmendrick and Molly would probably no longer exist in the other world after such a long time.
Since that moment, many more centuries in the country passed where Celestia ruled and protected the ponies from harm until today. Again, the older generations passed away and opened the way for the new generations. The new generation comes with new traditions. Despite that no humans were left here, Celestia noticed that the behavior of the ponies evolved fast. Their characters were now very playful and younger. They started to use tools to produce food faster. A lot changed in the variety of the food. Suddenly there were numerous different kinds of vegetables and fruit they could eat. The small village "Ponyville" grew to a large town. As one of the first earth ponies, a family from Apple Loosa decided to build an Apple Orchard in Ponyville to supply the city with extra food. The founder of the farm "Sweet Apple Acres" were honored by Celestia with a personal visit. The two ponies were known as Granny Smith Apple and Pink Lady Pie. Granny Smith was an ACE on the plantation, and no other pony but she managed it to grow so many varieties of Apple. Pink Lady Pie was one of the first Bakers in Ponyville. When she offered Apple Pie as one of her first dishes, all ponies were so impressed that she gained importance very quickly. Soon after that, she decided to build a private bakery named "Sugarcube corner" in the city center. But before that, the summer came first. She developed new recipes and baked in addition with more sugar, so that the ponies are provided with the necessary calories that they would need over the next winter with ease.
A few years later began the ponies continue to evolve themselves again. They were concentrating on studying the environment; to try out new things. Many of the ponies were teaching others about the past of Equestria. But about the past before Equestria was there Celestia was the only one who knew what happened. But many ponies went to the Princess in hope she would teach them and tell them how it was before Equestria existed. And one pony showed so much dedication that Celestia hired her as her student. Her name was Sunset Shimmer. Sunset was always curious and ambitious. At this point Celestia had never expected that this would be a problem after a time. As Sunset Shimmer became aware of the portal to the human world, Celestia didn’t want to take her in danger and told her to avoid the portal. But Sunset Shimmer ignored this order and wanted to know more about the portal. After that Celestia threatened her to abort her teaching of Sunset Shimmer. However, Sunset Shimmer didn’t respect Celestia that much so he went through the portal to the human world. She promised to get even more powerful than Celestia. She feared that Sunset would return with allies. So, she closed the portal with a spell that allows her to pass the portal every 30 moons. So, Sunset Shimmer had no chance to come back and the portal could be left open.
Celestia reproached herself that she failed as a teacher. But she wanted to make this incident good again by looking for a new student.
After Celestia had recovered from this experience, she ordered a new examination to check which unicorns of Canterlot had enough power to keep up with Celestia's lessons. The directive was Sunset Shimmer, of course. Celestia was especially interested in one unicorn: Twilight Sparkle. She was a very skilled unicorn, but she has a bit of practice problems. She had to hatch a dragon egg with magic. Suddenly Celestia noticed that there was a big bang outside. She looked outside and saw the same rainbow she first saw since the creation of the new world. This had to be a very special moment. That was something Celestia didn’t experienced again in thousands of years. When she came back to see how the examination was going, Twilight get distracted so much from the bang that she had no stage fright in front of the other ponies in the examination. She managed to hatch the dragon egg...inside the egg was a little purple baby dragon with green spikes. He was given to Twilight to take care of him.
Now the time had come: The day after tomorrow was the thousandth year of the Summer Sun Celebration. Celestia had to think about Luna again. The grief and the feelings of guilt came up again after all this time. 1000 years passed until now since she banished Luna to the moon. Celestia knew, on the longest day in the thousandth year the stars would help her to escape and she would provide eternal night. Celestia hoped only that Luna turned back during this long period of time and would return to Equestria in peace.
"I'm so sorry, my little sister. I hope we can forgive each other after all this time... ", She sobbed, as she was suddenly torn from her day-dreaming by a letter."
The letter came from her student Twilight Sparkle.
„My dearest teacher, my continuing studies of pony magic have led me to discover that we are on the precipice of disaster… I await your quick response.
Your faithful student
Twilight Sparkle."
Celestia knew exactly what she was talking about. But she did not want to confuse twilight. So far, since the transformation into nightmare Moon, Luna was known only as 'The Mare in the Moon'. Twilight had apparently found the old books. But this secret had to be protected absolutely. So, Celestia wrote Twilight the following letter:
"My dearest, most faithful student Twilight. You know that I value your diligence and that I trust you completely, but you simply must stop reading those dusty old books. My dear Twilight, there is more to a young pony's life than studying, so I'm sending you to supervise the preparations for the Summer Sun Celebration in this year's location: Ponyville. And, I have an even more essential task for you to complete: make some friends!