This story is a sequel to Family Reunion
The Main Six, plus Starlight Glimmer and Spike, decide to take a vacation and opt on a trip to Neighagra Falls to get away from their stressful and often downright strange lives. After exploring the nearby caves, Starlight and Spike are caught up in a mysterious flash of light and suddenly find themselves in Canterlot...except that it's a thousand years in the past! Careful not to attract any unwanted attention (or inadvertently cause any time paradoxes), the two seek out Starlight's great-great-so-many-great's-great-grandfather, the legendary Clover the Clever to return them to their proper time. Along the way, they encounter younger versions of the present-day diarchs, anachronisms, a treasonous conspiracy and an angry witch.
To think...they just wanted a vacation away from the weird stuff.
Set during Season Six; takes place after "The Saddle Row Review" but before "Spice Up Your Life"
*Exists in my head-canon universe