Clover the Clever was the student of Star Swirl the Bearded, the unicorn sorcerer Twilight dressed up as in "Luna Eclipsed".
Commander Hurricane is played by Rainbow in the play, but according to the book The Journal of the Two Sisters, the real Commander Hurricane was male. Likewise, Clover the Clever and Chancelor Puddinghead were played by Twilight and Pinkie respectively, but established as male in My Little Pony Equestria Girls: Forgotten Friendship (2018) and "Marks for Effort", respectively.
Friendship Report: The leaders learned that love and friendship are stronger than hatred.
Princess Platinum (Rarity) decides to dub the new land "Unicornia", which is the name of the city where all unicorns lived in the Generation 3 special My Little Pony: The Runaway Rainbow (2006).
This is the first Christmas-related episode of the series, followed by "A Heath's Warming Tail (Season 6)" and "The Hearth's Warming Club (Season 8)".