A.C. - After Coronation

Damn you shower thoughts...

3 A.C. - The Young 6 graduate from The School of Friendship.
5 A.C. - Prince Blue Sky is born to Princess Cadence and Prince Shining Armour. He is born a Pegasus.
7 A.C. - Star Swirl the Bearded passes away. Knowing that the current era of peace may end when those who helped create it are gone, Princess Twilight Sparkle begins forming The Empire of Harmony.
9 A.C. - Yona and Sandbar are married. Laws are changed to allow this.
11 A.C. - The Empire of Harmony is formed between Equestria, The Crystal Empire, The Dragon Lands, The Gryphon Kingdom, The Changeling Hive, Yakyakistan, The First Nation of the Buffalo, Saddle Arabia, The Kingdom of the Hippogryphs and the Kirin. Storm King's Realm, Bug Bear Territory, Armimaspi Territories and Zebfrica hold out.
15 A.C. - Princess Flurry Heart ascends to the throne of The Crystal Empire at the age of 18.
21 A.C. - The last confirmed sighting of Princess Celestia and Princess Luna.
23 A.C. - Knowing that he will never have the throne Prince Blue Sky leaves The Crystal Empire to live a normal life away from being royalty.
24 A.C. - The Gryphon Kingdom threatens to leave the Empire of Harmony after a new king is coronated for the first time in over a hundred years. Gallus resolves the problem and is promoted to Captain of the Guard in the Equestrian Military.
29 A.C. - The last of the Pillars of Harmony passes away.
31 A.C. - Zebfrica joins The Empire of Harmony after Zecora returns from banishment to retake her crown.
32 A.C. - Twilight Velvet, Twilight Sparkle's mother, passes away.
32 A.C. - Crystal Cake is born to Princess Flurry Heart and her unwed lover Pound Cake after a night of consoling and passion after her grandmother's death.
41 A.C. - Events of The Last Problem occur.
42 A.C. - Starlight Glimmer and Trixie retire together. Sunburst stays on to help The Cutie Mark Crusaders as they replace them as Headmare, Co-Headmare and Councillor.
45 A.C. - Night Light, Twilight Sparkle's father, passes away.
45 A.C. - Shining Armour taps into The Ether in an attempt to speak with his parents again resulting in the return of King Sombre [again]. Flurry Heart defeats King Sombre but at the cost of her father's life and becomes one with The Crystal Heart giving her immense power but making her unable to leave The Crystal Empire. This causes a falling out between her and, now prince, Pound Cake who takes Crystal Cake back to live in Ponyville.
52 A.C. - The Storm Prince declares himself king and invades The Arimaspi Territories creating a new army.
53 A.C. - The Storm King's advance abruptly stops.
57 A.C. - The first of the Elements of Harmony passes away due to old age, surrounded by her friends.
64 A.C. - Fluttershy and Discord, having chosen to give up his immortality when he saw Fluttershy's first grey hair, pass away. Discord leaves a riddling prophecy: 'Time heals all wounds but may cause others to show. The stars, random chance or even dumb luck may fix this but really there's no way to know for sure. That was a prophecy, by the way.'
69 A.C. - Gabby, Spike's lover, passes away. Spike leaves to travel the world for some time.
69 A.C. - The last Element of Harmony [other than Twilight] passes away [it was Rarity and she died of a broken heart for Spike].
74 A.C. - Blurry photographs of the moon show possibly evidence of Luna and Celestia's whereabouts.
77 A.C., AKA the current day - The Young Six are now The Old Guard. Luster Dawn and her friends [except one] are teachers at the School of Friendship. Crystal Cake meets her cousin Skyfall at the school when Twilight accidently approves her 'grand nephew''s application thinking it was a typo. Ember is now an adult dragon. Spike has been seen in Bug Bear Territory getting into fights. Equestria's magical defences are all but gone and relies on the unity of The Empire of Harmony for safety of itself and the other members of the empire. A meteor hits equestria. A coin is flipped and lands on its side. A stallion drops a winning scratchee. A crack shows in the statue of Gozy Glow, Tirak and Queen Chrysalis.

Welp, that's an hour of my life wasted writing that...
I thought it was clever that the last problem is 41 A.C. + 9 years of the show, exactly 50 years after it started.
I was tempted to make Skyfall a hybrid race but that seems too much like my current story. Ooo… maybe he's also AJ's grand nephew from Big Mac and Sugar Belle.
I think I forgot about Zecora… or maybe she's still Queen of Zebfrica.
If I mentioned every character who died this would be a lot longer.
Zephyr Breeze is still alive and is basically that joke of 'me in a retirement home in 80 years' *something millennials do that current old people would never do*
Wait... wouldn't Crystal Cake be... 35? why is she going to the school? Damn it. Maybe another generation down and great grand niece/nephew.
Why did The Storm King stop? IDK... maybe he found the real Grogar? Afterall, he did think he was connected to the arimaspi before we found out he was discord.
What ever happened to Smooze?
Flim Flam brand text books. Required for the School of Harmony courses. They're dead and never saw any money from it.
Is Silverstream the queen now? or was she the niece, not daughter? maybe something happened and she is?
Diamond Tiara and Silverspoon? Proud owners of the text book company hahaha
New gryphon king became king after getting that chalice [or w/e it was] back from that chasm. Gilda is pissed that all it took to become queen since she almost did once. Gilda died fighting Tirak in season finale. Seriously.
Fluttershy released all the animal from Tartarus and Cerberus just kinda wonders the land now.
Celestia and Luna being on the moon is a Watchmen reference.
I'm just making this chit up as I go and am wasting time so I'll stop.