Every Friday, from five in the afternoon to eleven at night, Pinkie Pie does volunteer work. She doesn't have to do it, the world won't stop if she doesn't, but she chooses to do it anyway. Even if it's doing seemingly insignificant little things.

It is a matter of life and death, after all. Literally.

Love is one feeling that can never be taken from someone's heart. No matter how many years of separation, no matter what wrongs were done in the past, no matter how much enmity exists between two ponies, love will always stand; at least that's what Nightmare Moon is hoping for. 700 years ago was the last time she had seen her sister Celestia, and her departing words had simply been 'I love you'. Now, after so long, Nightmare Moon's heart longs for its other half; and thus, she has brought Celestia back from the far away, magically void lands she cast her to so long ago. Now, she wonders if her sister will ever find it in her heart to forgive her for what she's done, and if their lives together can ever resume as they once had.

Takes place 300 years before when Luna would have returned from her banishment to the moon, and takes place in a universe where Nightmare Moon was never banished in the first place.

TVTropes Page!
Thanks everyone for getting the story to the feature box! (12/10/16)
This is now my 1st story to have broken 200 likes! Thank you all so much!
SPOILERS IN THE COMMENTS

You just want to be left alone. Pinkie won't let that happen. She's been there.

Lighter, fluffier sequel: https://www.fimfiction.net/story/373623/youre-getting-better

It is the year 2038, and the Earth is slowly being consumed by a space-borne monstrosity dubbed the Black Tide, which is using nanotechnology to remake the planet into something hideously alien.

Erin Olsen works for Project Harmonics, humanity's last-ditch effort to find a new world before the Tide can wipe them out. But when that world is found, and it turns out to be occupied, Erin will need to find the courage to face the unknown in order to save the inhabitants of both worlds.

(Many thanks to Easteu for the fantastic cover image for this story!)

Now with its own TV Tropes page

There is now a follow-up to this story: Sunflower - Side Projects
Sequel: Project Sunflower: Harmony

This story is a sequel to Reformation Buddies

After the Friendship Games, a cold war of academic ideologies has sparked at Crystal Prep Academy. While Dean Cadence pushes for a new student exchange program and a more friendly environment, Principal Cinch is instituting stricter rules and more drastic measures to keep her students in line. There are even rumors of a No Magic rule being enforced, though the details are sketchy. With so many mixed signals being thrown around, no one really knows what's in store for the prestigious institution.

Over at Canterlot High, meanwhile, the Sirens have their own problem. Sunset Shimmer's research has shown that music isn't the only way to tap into the magic of friendship. It comes out when those that wield it are true to themselves. Only problem is none of the Sirens know what that means. This is especially disheartening for Adagio Dazzle, who hasn't even regained her powers at all.

After hearing about Dean Cadence's student-exchange program, Sunset decides that she can help the Sirens and the Shadowbolts in one fell swoop by signing them all up for the program. For one week, she and the Sirens will be attending Crystal Prep, discovering their true selves while unraveling Principal Cinch's draconian schemes. Sounds simple, right?

Well, now add Discord into the mix, along with a dash of distrust from Adagio and just a pinch of the Shadowbolts not exactly being a united force. Yeah, Sunset really has her work cut out for her.

Takes place before Legend of Everfree.

Special thanks to Bookish Delight for inspiration and help with conceptualization.

Cover art provided by the amazingly talented GemiNiah.

Few would suspect that Pinkie Pie would be good at chess. A game as nuanced and subtle as chess requires concentration, strategy, and forethought. None of which Pinkie Pie possesses.

Right?

Inspired by devastating personal losses, Apple Bloom dons a mantle from her youth to counter Equestria's rising crime after a dramatic change in government sends Canterlot into disarray. As more heroes follow her lead and arise in other cities, she must face her own past and dark new evils on the path back to harmony.

This story is a sequel to Post Negative Comments Only

He's been reassigned so many times as to have a file thicker than his armor. There are ponies who doubt his ability to cross a room without creating a disaster, and he's one of them. Banishment to Moon is in fact too good for him. He's the single least suitable member in the history of the Crystal Guard, and history had better be prepared to take on eternity if it's ever going to see him surpassed. Because Flash Sentry starts every morning with a silent declaration of I'll get fired today and goes to sleep on I'll be fired tomorrow.

Or maybe that's more of a prayer.

(Part of the Triptych Continuum, which has its own TVTropes page and FIMFiction group: new members and trope edits are welcome. This story takes place after the events of Post Negative Comments Only, so reading that one first is highly recommended.)

Now with author Patreon and Ko-Fi pages.

This story is a sequel to Bards of the Badlands

  Sunset hates dealing with chaos surges, no matter how amusing Moon Dancer finds them. After a particularly annoying surge while tutoring Moon Dancer in her advanced telekinetic studies, Sunset takes refuge in the teacher’s lounge. Though she was only looking for a cup of scalding hot tea, Sunset finds a pony walking down the same path she once walked, giving her an opportunity she’s never had before…
  To help somepony not out of guilt, but just because it’s the right thing to do.

Featured on Equestria Daily on September 19, 2016!

Historian’s Note: Set in a timeline where the Sonic Rainboom never happened, Bell Curve occurs in Sunset’s second year as an aide for Professor Apple Polish at Celestia’s School for Gifted Unicorns and several years before the events in The Application of Unified Harmony Magics.

Cast: Sunset Shimmer, Cheerilee, Moon Dancer & Professor Crystal Clear with Philomena as herself.

Stories set in the Wavelengths Timeline in chronological order:

Origins Arc
The Alchemy of Chemistry
Bards of the Badlands
Grading on a Bell Curve
Habits of the Equestrian Phoenix
How Not To Use Your Royal Prerogative

Applications Arc
The Application of Unified Harmony Magics
Princess Celestia: A Brief History
The Cloudsdale Report

Dreamers Arc
Tactics of Snowbound Unicorns
A Study in Chaos Theory
Teahouses of Saddle Arabia
As the Raven Flies

Cover Credits
Cover Design by Amber Spark using Pixelmator
Sunset Shimmer Vector by Midnight-St4r
Cheerilee Vector by J-Brony
Sunset Shimmer Cutie Mark by MillennialDan

Editor & Beta Reader Credits
Ebon Quill - Worldbuilding Writer on The Manehattan Project
Little Tinker - Sysadmin at Poniverse
Painted Heart

Special Thanks:
Orbiting Kettle - For some sorely-needed advice on getting something approaching a good synopsis for this tale!

Cadance isn't Sombra. But Sombra's leadership is all the crystal ponies remember, a ruler they had to love at all costs, with the final payment being their own lives. And as they gradually come to see their new Princess as leader instead of savior, too much of that residual fear is being transferred to her. They praise her, adore her, refuse to correct her no matter what she does -- because they live in terror of the consequences for doing anything else. They have yet to find their own voices, and may go on repeating hers until Celestia and Luna switch shifts. So how can she make them tell her when she's wrong, see that there's nothing to be afraid of, and take the next step in coming back to themselves once and for all?

Forbidding them to do anything other than criticize her should do the trick, right?

...right?

(Part of the Triptych Continuum, which has its own TVTropes page and FIMFiction group -- but can be read as a stand-alone, and no knowledge of the other stories is required. New members and trope edits are welcome.)

Now with author Patreon and Ko-Fi pages.