To Twilight Sparkle and Princess Celestia, it is a simple surprise visit to Canterlot. To the ponies of the Equestrian Civil Service, it is twenty-four hours of chaos, politics, weaponized dessert, politics, underhooved manipulation of media, politics, and things batrachian and tentacular. Who said bureaucracy isn't exciting?

During a lull in the conversation at an upper class charity dinner, Rarity takes a moment to contemplate some commonly held assumptions made of Princess Celestia. Specifically, her table manners.

In a freak accident from the Cloudsdale weather control team, Twilight is struck down by an errant lightning bolt. But the veil of death is relatively thin...

Minuette is determined to have a nice date with a nice stallion, no matter what that takes.

Twilight Sparkle just wants her to stop wreaking havoc on the time-space continuum.

Things get complicated.

Edited by Exuno
Preread by Barbeque

The royal court of Canterlot welcomes its newest member with open forelegs: the human philosopher Voltaire, from Earth.

On Earth, Voltaire is known as the greatest enemy of tyranny in the history of literature, and a legend in his own mind.

On Equestria, the court betting pool is giving him a week before the Princess banishes him to the Moon.

Note: This story doesn't have sequels per se, but there are a couple of short follow-ups set in the present day ("Parade Coverage" and "Secret Histories"), and a prequel of sorts in "At the Inn of the Prancing Pony".

TV Tropes page.

Distance can drive us apart. It can also bring us closer together.

After all is said and done, and the ponies have gone their separate ways, the only way they have to keep in touch is through letters.

Original Equestria Daily post is here
Russian translation
Chinese translation
Polish translation
Spanish translation

Now with music and audiobook