Background and release
On November 23, SM Entertainment confirmed that the group is set to drop a new winter-themed album in December. On November 24, Taeyeon, Tiffany & Seohyun revealed the first Christmas concept teaser image for their upcoming Christmas album. It was later announced that their Christmas album was to be released on December 4, and promotions of the lead track, Dear Santa were to begin on that day, starting with KBS's 'Music Bank'.
From November 25 to November 28, individual and group teaser pictures were released. On November 29, SM Entertainment announced that on November 30 at 7 p.m. (KST), the teaser for the music video will be released through TaeTiSeo’s official website and SMTown's YouTube Channel, on December 3 at 8 p.m. KST, they will hold a showcase "X-Mas Special – Dear Santa" at the SMTown Theater in COEX, in Seoul.
On November 30, it was revealed that the subunit and labelmates EXO will donate a part of the profits from their Christmas albums to a charity called SMile for U, a campaign held between SM Entertainment and UNICEF.