Planet Z-7

 was a small planet that Nibbler's personal chauffeur destroyed on 2 March 3013 while looking for a ship that he lost on 31 December 1999. It seemingly used the month of Flomuary, which has at least 39 days.

Production
Planet Z-7 was first seen in the selected animatic for 7ACV23, which had been released online by July 2013.

Trivia

 * Planet Z-7 resembles Kif's homeworld.
 * In "Raging Bender", the crew goes see a film that is not suitable for aliens from Planet M-14.
 * Season 7 features another planet with the number seven in its name.