The sun set on New Year's Eve. Then an even more beautiful moon rose, silvery and shiny.
Celestia and Luna stood beside each other, waiting for the Canterlot Clock to strike twelve. The Sun Princess turned to her sister. "This was a beautiful year, Luna."
"Indeed, Tia." The Princess of the Night smiled and lay down on the marble balcony overlooking the towns of Equestria below. Celestia joined her younger sibling, and the two sat in silence for a few minutes.
Finally, Tia decided to speak up. "This has been the best year of my life since a thousand years ago." the alicorn looked up to the sparkling sky. "My favored student has found her place as a princess beside us..." Luna then felt a nuzzle as Celestia leaned up against her lovingly. "And my little sister is no more a feared outcast."
More silence. Luna did not verbally reply, but she did smile.
After a few more seconds of no sound other than the noises of parties down in Canterlot, Celestia perked up. "You know what would make this night even better, Lulu?"
"What, sister?" Then the clock set off in the town square.
Tia pecked Luna on the cheek... and ran for her life. The Princess of the Night sat there for a second, shocked, then yelled, "Gross, Tia!"
Then the chase began.
Celestia galloped down the main hall, surprising some guards and even knocking over a visitor, she thought. A "sorry!" resounded after she had disappeared around the corner ahead. One unicorn soldier looked to the pegasus guard beside him. "Princess Celestia?" Not a minute later, the second princess who inhabited the castle flew past at full speed, accidentally knocking down both guards in the process. Another "sorry!" echoed.
The unicorn, who was a new recruit, asked his partner, "Does... this happen often?"
The pegasus smiled. "All the time."
***
Celestia, galloping at maximum speed, found a fork in the halls. Which path should she take? After almost no further consideration, the left side was chosen. But unknown to the Sun Princess, a male guard of Celestia's and a female bat-pony guard of Luna's were conversing in the darkness of the hall, and when the ivory alicorn sped by, the ponies were pushed into each other, their muzzles touching. Both were astonished, but surprisingly, neither wanted to let go.
Luna flapped her wings quickly, but when she came to the split, she stopped, landing gracefully. She looked to the left, then to the ri-- she immediately looked left again and said dryly to her guard, "Seriously, Luminescence?"
The bat-pony let go of the day guard at once and saluted. "It... wasn't my fault, Your Highness. Princess Celestia came through and--"
"Tia!" Luna took flight again and soared down the dark hall.
"Well..." Celestia's guard's cheeks and ears grew bright red. "Hon-Honestly, that was..."
"Enjoyable?" Luminescence finished.
The day guard smiled slyly. "Wanna do it again?"
The bat-pony leaned forward.
***
Dead end! Celestia skidded as she dug her fore-hooves into the ground, and stopped just before she hit the wall. So that's why this hallway was so dark and unused.
The flapping of wings could be heard down the hall. "Oh, Tiaaaaaa...." the call echoed. The Sun Princess awaited her consequence, and was pushed to the ground as another pony tackled her. Both sisters laughed.
"Happy New Year, Tia."
"Happy New Year, Lulu."