Celestia's morning has been difficult enough, between hearing Twilight's confession of love, and then breaking her heart as gently as possible. Mere moments later, her private chambers are rocked by the shockwaves of a time-traveling spell. This marks the arrival of Celestia's alleged lover from five thousand years in the future, Princess Twilight Sparkle—or as she insists on Celestia referring to her, Glitter-Flanks.

Armed with thousands of years of knowledge of which buttons to push and how to make her squirm, Glitter-Flanks has traveled back to this date for one singular purpose: to establish the closed time loop that sets the two of them up as a couple.

Starlight Glimmer has gone back in time. Each time Twilight tries to stop Starlight, she fails and is flung back through the portal and into a broken, twisted Equestria, ravaged by wars or monsters, each version worse than the one before, barreling toward the destruction of the world. Until she lands in a version of Equestria that ... isn't worse. It seems unchanged, happy, normal. The only real difference she can find on the cutie map is that her castle isn't there ...

... but the library still is.

Editing by Formerly Committed and JetstreamGW.

Fashion shifts fast-forward for Rarity one fateful summer day. It's the day that her four future selves, each carrying a magical time amulet, show up in her studio! But will her destiny, her sister Sweetie Belle’s destiny – and the future for all Equestria for that matter - be irrevocably changed by what they tell her?

Update: Wow, put in 'Featured', 'Twilight's Library', and 'Celestia's Library'! I am honored.
Update to the Update: I'm on Equestria Daily? I am honored and flattered!!
Update to the Update to the Update: Youtube Video review by Strebiskunk!
Update to the Update to the...oh, you know the drill by now: 'Time Enough' has just been added to the elite 'Royal Guard' group of stories, huzzah!

If you think that your day is a little too short,
With too much to do for twenty-four hours,
Then you fall back on the final resort,
And go back in time with your magical powers.

Princess Celestia, in her infinite wisdom, comes to the conclusion that she doesn't have anywhere near enough time to do everything on her busy schedule. Not a problem for her, though. The solution to having no time is obvious: just make some more.

Twilight isn't having a very good day. An experimental spell blew up in her face, an army of changelings is attacking Canterlot, and she just died. Yet somehow, it looks like it's going to keep going downhill from here.

Given the chance to correct what's gone wrong, Twilight swears she's going to fix all this even if it kills her. Which it will. Frequently.

Cover art by Pixel Prism
Spanish Translation
Series TV Tropes page

This story is a sequel to Hard Reset

After the events of Hard Reset Twilight's life and mental well being are slowly returning to normal. Her recovery is cut short, though, when a letter arrives informing her that the time loop spell she cast is causing severe damage to space and time itself. In over her head, Twilight tries to summon anypony who will know how to fix it. The pony she gets is the last one she ever thought she would meet... and nothing like she expected him to be.

Available in Spanish thanks to dgs1993
Series TV Tropes page

This story is a sequel to A Stitch in Time

Having discovered the message left for her by Star Swirl the Bearded in the distant past, Twilight once again finds herself caught up in the middle of a struggle against forces far greater than herself. In order to even stand a chance she'll need to travel further and wider than she ever has, and forge some unlikely alliances with old enemies. All to bring down the powers that have manipulated and shaped her entire life, and retake control of her own future.

The conclusion of the Time Loop Trilogy, which began with Hard Reset
Available in Spanish thanks to dgs1993
Series TV Tropes page

Princess Celestia always knew that Twilight Sparkle was destined for great things, but she never revealed the source of that knowledge, not even to those closest to her. When the day of Twilight's true destiny finally arrives, can Celestia fulfill an ancient promise to save Equestia's past, present, and future, even it means saying goodbye to Twilight forever? How can Celestia refuse her mother's last wish?

Art by the inimitable Harwick

Twilight Sparkle definitely learned her lesson from her last time-travel experience. This one's not her fault. Really. Sometimes nature can be... annoying.

Featured on Equestria Daily!

Many thanks to Uma for the story idea.

Reading by The Living Library Player Society.