Uwa!! So Holiday♫
cold outside but stay warm inside of you
Uwa!! So Holiday♫ is the 18th track in the UNDERTALE Soundtrack. It plays in the Settings menu during the months of December, January, and February. It shares its melody with Uwa!! So Temperate♫ and Uwa!! So HEATS!!♫.
It appeared during the UNDERTALE 6th Anniversary Stream as a "COMMON" track.[1]