The Doctor is below the main console, changing a couple of the blue thermocouplings that had shorted out, when he hears the knock on the door. Not expecting anyone, he is a little surprised, but he bounds to the door regardless. Throwing it open with a wide smile, he finds... the nation of Ukraine, babbling. About his head. And what day it was.

Well, this was new. "Ukraine! Why don't you come in. My head is fine, and today is the 15th of October.

...Why do you ask?"