What is the title of the 2015 Frozen short set on Elsa's birthday?

The 2015 Frozen short set around Elsa’s birthday is titled Frozen Fever.

The short takes place about a year after the first film and centers on Elsa’s attempt to give Anna a perfect surprise birthday celebration. Elsa, Kristoff, Sven, and Olaf organize a treasure hunt and prepare gifts, but Elsa develops a cold. Each sneeze accidentally creates tiny snowmen called Snowgies, which disrupt the festivities.

Frozen Fever reunited the original principal voice cast, including Kristen Bell as Anna, Idina Menzel as Elsa, Jonathan Groff as Kristoff, and Josh Gad as Olaf. Chris Buck and Jennifer Lee returned as directors, while Christophe Beck composed the score.

The short premiered theatrically on March 13, 2015, alongside Disney’s live-action Cinderella. Its featured song, “Making Today a Perfect Day,” was written by Robert Lopez and Kristen Anderson-Lopez. It is distinct from Olaf’s Frozen Adventure, the 2017 holiday featurette, and Once Upon a Snowman, a 2020 short focused on Olaf.