How the Grouch Stole Solstice

S2, E15: Told in song. Stardust Bay is abuzz about the Winter Solstice. Every year they gather to watch the Sun set on the shortest day, and then celebrate all night - the longest night of the year. But Vulture finds this disturbing: the festivities cause Stardust Bay to lose productivity. Hoping to sabotage the holiday, he sends a team of cadets into space to adjust some satellites, but doesn't reveal his true purpose - to reflect sunlight back to Earth. To everyone's horror, the night sky suddenly vanishes and sunlight bathes the academy. But the kids are undaunted, and continue their celebration. Vulture is stunned to realize that wonder and imagination can't be stopped. Feeling the heat, he shuts off the satellites and a glistening night sky returns. A super Solstice to all - and to all a long night!