Inexperience is a foreign concept to Celestia. At least she thinks it is. Right up until the moment a rash decision leaves her with a student who is a dozen years younger than what she's used to.

Enjoy.

After discovering some more of Star Swirl’s unfinished spells, Twilight's curiosity causes her to cast one, in spite of Spike's warnings. To her surprise, the spell doesn’t seem to do anything. Frightened that perhaps she repeated her previous mistake from Magical Mystery Cure, she rushes to Ponyville only to find everything is as it should be. After this, she agrees not to try to fix any more spells and goes to sleep...

Only to wake up in the past.

Using this opportunity, she begins to correct past mistakes. There are some setbacks, but overall Twilight believes she is making the world better.

Yet as she seeks to fix the problems of her past, she will find that sometimes past mistakes are exactly what our future needs.

For those wondering about continuity with events in the show, chronologically, I'd say the events take place just before the episode Filli Vanilli. The basic outline of this story was actually planned out before season 4 began and much of it was written before the end of season 4.

This fiction was featured on Dec. 9, 2014 - Now that's a great Hearth's Warming present. Thanks guys.

If you want to know more about the writing process for this story, you can check out my blog post More About "More About Time" for, well, more about this story.

For almost a thousand years, the immortal Nightmare Moon has reigned over Equestria as Empress. To the average pony, Nightmare Moon is an overarching enigma whose rule is absolute and whose wrath is terrible. But to Twilight Sparkle, who as an orphan has never known her parents, the Empress is something else entirely. When the young unicorn is brought under the royal wing as an apprentice, she learns a great deal more about the supposed tyrant than she ever knew. But as Twilight is introduced to life with her new mentor, she is thrust into a world of political intrigue, conspiracies and secrets. Secrets that were never meant to be revealed. As allies and enemies plot against the very peace of the nation, will Twilight fall prey to the perils of her new position? Or will she prosper and find in Nightmare Moon the mother she never had?

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My eternal gratitude to my editor, LordOfTheWrongs, without whom Night's Favoured Child would not be the story it is today.

Now with added TVtropes!

This story is a sequel to Celestia's Tiny Student

(Title changed from "Ponyville's Tiny Librarian" for reason pointed in this blog )

Twilight Sparkle is a one-kilogram pony the size of a large rat, shrunken by Princess Celestia following her entrance exam to the Celestia’s School for Gifted Unicorns to ensure that her power surges would not pose a danger to the ponies around her.

She’s spent thirteen years full of hard training at her new size, facing the life-threatening experiences that came with living in a world of giants. To survive those thirteen years of hardship and joy, of learning and adventure, and of pride and humility, Twilight has challenged herself to be stronger, to overcome any obstacle.

Now that tiny Twilight is on her way to Ponyville to oversee the preparations for the Summer Sun Celebration, how well will this miniature mare fare outside of the confines of the castle? How will the other Element Bearers react to her? How will Nightmare Moon react to the tiny unicorn? Is Twiny prepared to face Ponyville, and, more importantly, is Ponyville prepared to face her?

Credits:
Art cover - kc day

Top editors: (editing and rewritting for months, hope quality is to your liking).
Kydois
Georg

Nightmare Moon's sentences editor:
Bahatumay

Applejack accent editor:
Crimson Star (Chapter 1 - Applejack)
Rebel Brony
The Notebook is grounded

Pinkie sentence's editor:
Plump it UP

Other editors:
Hereward
tana1100
Lab (small editing from prologue to chapter 4)

Pre-reader:
Rated Ponystar

To celebrate the release of this sequel, I created a group called “Twinyverse” for all fans of this story where you can talk about it and track all side stories with ease.
The Twinyverse Group

Reader, in ancient days, the old lords of the world numbered in thousands. Then hundreds. Then even less.
Now, they are found only in tapestries and fanciful ballads.
The creatures are all vanished. All but one.

Rumors say there are more of him, somewhere far away. A young and supposedly gifted mage called Star Swirl, and Heartstrings, a gentle spinster, have joined him on a journey to find the rest.

Featured in The Royal Guard's Fic Spotlight #5
TV Tropes page (that could use more love)

With her knowledge of time spells enabling Twilight Sparkle to travel into the far future of Equestria, she contemplates all she has seen, and reveals the true reason for her journey.

The royal court of Canterlot welcomes its newest member with open forelegs: the human philosopher Voltaire, from Earth.

On Earth, Voltaire is known as the greatest enemy of tyranny in the history of literature, and a legend in his own mind.

On Equestria, the court betting pool is giving him a week before the Princess banishes him to the Moon.

Note: This story doesn't have sequels per se, but there are a couple of short follow-ups set in the present day ("Parade Coverage" and "Secret Histories"), and a prequel of sorts in "At the Inn of the Prancing Pony".

TV Tropes page.

Becoming an immortal alicorn princess pony can be hard on a mare. On the one hand, Twilight now has near limitless power, but on the other, with great power comes great annoyance. Luckily that whole "near limitless power" thing kinda negates that. Still though, no one ever said banishing everypony to the moon would be easy.

Written for The Writeoff Association's inaugural writeoff, Lonely Happiness.

The newest story of mine, and a bit of a special in the spirit of Halloween. The premise behind it being; what if the Dark Magic Twilight used at the beginning of Season 3 had side effects, side effects that have not had any noticeable effect on her until recently? What if King Sombra, a powerful Dark Magic user, wasn't entirely defeated by Twilight and Company? What will become of Twilight and her friends? I won't spoil it, but I'll tell you it likely won't be a happy ending for anyone involved.

Luna has had enough of Celestia's games, and has found the perfect means of revenge. Using a long-forbidden spell, she transforms her sister into little more than a small filly, all so she could pull the greatest prank ever. Unfortunately, she soon learns that before you fool around with dangerous magic, you really need to read the fine print...

A sequel can be found here.