This is a fic based on the Time Loop Files, the format of which was first codified by Innortal on fanfiction.net.
Here's a brief guide.
The basic idea is, one character (the Anchor, usually the main character of a fictional setting) is looping back to the very first moments of their parent series every time either they die or some kind of time limit expires. They of course end up monumentally stir crazy given enough time.
Eventually others start to loop as well.
The reset is not always perfect. Sometimes a loop's history will be different to the "prime" loop, or canonical plot.
"Crossover" or "Fusion" loops also occur, randomly. These can involve the home loopers having a guest, or the anchor for one universe spending time in another, or replacements of one character by another.
Vacation Loops are where the Anchor (or others) decide/s "buck it" and lets off steam by doing whatever comes to mind. There's little or no attempt to maintain the original timeline.

In addition, and particularly more recently, it should be known that this story has a collaborative element to it - people may submit loop ideas or loops, ideally at the Spacebattles thread (a link to the current version of which is on the Trope page), and they may become included.

There's two page image options, thanks to Filraen - the current page image has been edited by the original creator from this work of theirs.. The other one is here:
http://hourglass-vectors.deviantart.com/art/MLP-Loops-466030169

Dragons are not hot! Or at least Twilight keeps telling herself. Seriously, what's wrong with a little meddling in transmogrification magic from time to time? It's not like there can be any... 'unexpected' side effects, right? Tried and tested, completely safe! That is, of course, if there's not somepony with a secret crush also involved.

Featured: 12/4/18

Edited by: Emtu
Cover art created by: xWhiteDreamsx

What's the worst thing you can do to a masochist? Tie them up and refuse to hurt them. What's the worst thing Celestia can do to a horny, kinky little sister who's harassing her when she's not in the mood? Well, it turns out Celestia has a stash of suspiciously appropriate kitty gear on hoof, and some time as a pet is just the punishment Luna needs.

Cute, silly, a little bit sexy, but not a clopfic. (Contains no sex.) This story will be some people's perfect catnip, but not everyone's cup of tea.

This story was commissioned by Cynewulf.

A depressed Anon, aided by countless books on psychology and philosophy, tries his luck at being a therapist for the fluffy ponies that surround him. Do ponies even have the problems he deals with? Do ponies even need the help he can offer?

Art by osawari_64

Edits by Tranquil Serenity.

It was one failed revenge attempt after another and this one was sure to be her last. The ex-changeling ruler, Chrysalis, was cornered by her enemies. They offered her a chance for 'redemption' and extended their hooves in friendship, but the queen would not accept. She charged a powerful spell and the ponies tried to stop her. There was an explosion and after the sound returned and Chrysalis was gifted sight again, she was greeted by pale white walls, various medical instruments, and her new life aboard one of the United Empire research ships.

Cover art by: xn-d

A long time ago, a yak was sent out by his leader on a quest to search for the best gift ever. After days of traveling and experiencing nothing but snowstorms, he's tired beyond belief, muscles sore and each step a pound heavier to take. When all seemed lost, he saw a lodge in the distance. With every ounce of his strength, he reached the lonely house, hoping that an ordinary caretaker would bring him in and help him in his adventure.

However, what he found was no ordinary caretaker; instead, what he found was more than he bargained for.

Thanks to Azure Drache for this story's brainstorming sessions.

Deliah May is a pudgy pink earth pony from a town in the middle of nowhere. All her life she dreamed of opening a flower shop in the city of Oatly Burg. Oatly Burg is the place where many entrepreneurs have cut their teeth in making their own business.

When she befriends the wife of a wealthy cereal producer things seem to be going her way. Then one day at work, Delilah runs into a charming gentlecolt with an attractive pair of wings. Haunted by a past relationship, will Delilah give in to her desires for companionship? Or will she be pushed away by his reserved nature?

(Includes Mild Suggestive Themes and Mild Language)

(Co-Written and Proofread by ZephyrStrife)

A Kirin remembers the Joy, Happiness, and Love that the Stream of Silence has robbed from them. They cannot even bring themselves to touch or hug the one they hold dearest in their heart. How has this cooling of their emotions truly affected them?

Editor: Mr Numbers

Artwork: Screencap from Season 8 Ep 23

After arriving to Equestria and accepting it as your new home, Princess Celestia helped you to find something you are good at, and to your surprise, what ponies call "your very special talent" is taking care of the little ones. That's why you became a fillysitter, which you thought was an easy job, but that idea began to fade away after that time when you ended up floating upside down by the magic of a purple unicorn baby.

A collection of stories about you and the foals of Equestria.

This cute cover art belongs to Sverre93.

During her time in isolation from her village, Autumn had given up hope of ever having any real bond with anyone. In spite of this though, her years alone were occasionally uplifted by a certain travelling stallion. One she found herself growing quite fond of. Now, even after having been reunited with her people, Autumn longs to see him again.

Today, she gets her wish.