This story is a sequel to Three Wishes: The Cutie Mark Crusaders Before They Changed The World

Twelve years after the Crusaders discovered their true nature, an ancient evil has returned. Celestia is hurt, magic is weakened, and Equestria is nearly lost. Now our heroes must find a way to fix things before time runs out, and the world falls to darkness forever. They'll join forces with friends they've made around the world, utilize amazing new breakthroughs in science and magic, and get help from some of the most unexpected of sources as they try to fix The Hole In The Sun.

Gracious prereading and editing help provided by: Dusk Watch, totallynotabrony, Mares Guyver, CMC4TW, SeaponyLover65, and Web Of Hope.

A young man named Dave, while writing a personal journal about his perceptions of liking the show "My Little Pony: Friendship is Magic", is unexpectedly whisked away into the land of Equestria, where his memories about the world even being part of a show are erased, leaving him lost in an unfamiliar land. Luckily, help comes to him in the form of a pony named Pinkie Pie, who immediately dubs him her new friend, and introduces him to life in Equestria...

Cover art done by Redback Spino

Editing: Firebirdbtops

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