Adventure, mayhem, magic of unknown origins. Oh, and talking ponies. These are the strange events that have brought three friends together into the wildest holiday that anyone could imagine.

It starts as a small Halloween chat, where they showcase their costume designs to one another. However, due to events outside of their control, they soon find themselves in a new land during a turbulent time.

Now trapped in a case of mistaken identity, these friends find themselves thrown into the deep end, when a royal wedding they’re asked to assist with is suddenly interrupted, and the three of them soon find themselves on an extended holiday from any sense of reality they ever knew.

We now have our own An Extended Holiday TVTropes Page:
A big thank you to wille179 for setting it up.
A/N: Now I would like you all to know first of all, this is a collaborative work between myself and some friends. So if you enjoyed this, why not stop by and say hello to the other three writers of this story. I have included their links at the bottom here.
Team Extended Holiday
American Brony - Writer
Teal Speckles - Writer
Shawn820 - Writer
OmniKitsune - Writer/Head Editor
Biker Dash - Editor

Big thanks to Shawn820 for the great cover art.
WARNING: There are spoilers in the comments. Read the comments at your own risk. By all means, please add to the discussions.

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