When Rarity is given an order for a dress, a series of unfortunate circumstances lead her to request the aid of Twilight Sparkle. When she discovers that Twilight has been studying time spells, she asks if she can help her recover some of her time. Reluctantly, Twilight agrees, but when she is performing her spell, something breaks her concentration causing the spell to become unstable, sending them 15 years into the future. What awaits them in a world where they have been missing for so long? Will they ever get back to their own time? Only time will tell.

*WARNING*
COMMENTS CONTAIN SPOILERS
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Art by Dreatos
- http://dreatos.deviantart.com/gallery/?offset=24#/d47n304
Seriously, check out his work. He is one of my favorite pony artists.

A horrible Cataclysm has turned all of Equestria into a Wasteland of barren ash and twilight desolation. The Sun and the Moon have been destroyed. Everypony has died--including Princesses Luna and Celestia. But one pony miraculously survives; she is a lone wanderer, the last of her kind, surrounded by menacing creatures that hate her. She navigates the Wastes in an airship and scavenges off the blighted landscape to keep herself alive.

Then one day she meets an old companion who grants her a gift, the chance to go back in time to the warm and sunny days of Ponyville, where her dead friends live in happiness. How far will the last pony venture into this joyous age of Equestria, even if she fully knows that there is no way to change the horrible fate of everypony she loves?

2013 Edition: Smaller Chapters, Better Grammar, and a Few New Scenes

(A shout-out to Vimbert, pre-reader and gentlecolt)

Pinkie Pie is being tormented by horrific nightmares. Unable to deal with it by herself anymore she seeks out Twilight's help, but will it have been the best decision when she finds herself alone in an abandoned, fog filled Ponyville?

Sequel: http://www.fimfiction.net/story/4676/Too-Shy-for-a-Rainbow

There have been a LOT of high-quality readings of Silent Ponyville, but this one is my personal favorite:
https://www.youtube.com/playlist?list=PLGh01rbB4o3xoSV7a6Omc-UJROXHRZ1Hv