"The Unbirthday Song" is a nonsense song sung by the Mad Hatter and the March Hare to Alice from Alice in Wonderland. It was included in Disney's Sing-Along Songs: Zip-A-Dee-Doo-Dah and Disney's Sing-Along Songs: Topsy Turvy. The song was rewritten for DuckTales as a proper birthday song in the episodes "Sweet Duck of Youth" and "Time Teasers". An instrumental version of the song can also be heard on the Mad Tea Party at the Disney Parks, as well as on the Alice in Wonderland attraction, and the Holiday edition of It's a Small World at Disneyland.