Cirque de Lune is the name of the travelling circus that was schedule to perform in Danville. Lawrence and Linda had planned to take Phineas, Ferb and their friends to see the performance. This outing was cancelled because the ringmaster of the Cirque developed a severe allergic reaction to wild parsnips (just like the one Candace has) which resulted in that day's performance being cancelled. ("Jerk de Soleil") It is a parody of the real-life traveling circus, Cirque du Soleil.
