From "Celestia's Chosen", this story would take place between Chapters 1 and 2.

It is Yosh's birthday and, as Spike has learned all too well, that duck beak on Yosh's face has a nasty habit of constantly moving. Something must be done.

Delight in a cute, short story that is focused around the concept that Celestia raised Spike while Twilight did her schooling. Not to mention the possibility that Spike wasn't the only dragon to whom had a destined unicorn to work with to uncover the mysteries of Equestria and beyond!