Holidays of Future Passed/References

Cultural references

 * The title is reference to the Moody Blues album Days of Future Passed.
 * Krusty's televised rant and his surroundings are similar to those by the late 60 Minutes personality, Andy RooneyMadmax.png
 * When Lisa first enters the ultranet, the first thing she does is respond to friend requests most likely those from Facebook.
 * Several of Homer's ships in bottles are fictional futuristic spaceships such as the the Discovery from 2001: A Space Odyssey and the Planet Express ship from Futurama.
 * The air travel shown is highly similar to themes and characters of the series.

Trivia

 * Lisa Simpson married Milhouse to presumably become Lisa Van Houten, unless she didn't change her name when she got married.
 * Martin Prince has undergone a sex change to become Martia Princess.
 * Just like previous flash-forward episodes, Maggie never says anything. The robot nurse told her not to say a word for the duration of her pregnancy, which took most of the episode. After she had the baby, when she was about to speak, Grampa interrupted her.
 * When Homer visits his dad in the cryogenics facility, other people seen in suspended animation include, Crazy Cat Lady, Superintendent Chalmers, and Agnes Skinner.
 * Lenny and Carl have switched brains.
 * This is the fourth episode set in the future and longest gap between two episodes set in the future.
 * Lisa's great-great-great-great half aunt, Eliza Simpson, married Milford Van Houten at some point in her life. This means Lisa is unknowingly married to her distant relative.
 * According to Ned, Homer is the reason Edna is dead, meaning they were together well into the 30 years between settings. This is also a play on Homer being the reason for Maude's death.
 * Nelson and Lisa's relationship from Lisa's Date with Density is referenced as Nelson tries to win Lisa.
 * Jenda from Future-Drama appears in a picture. It's revealed that she married Bart, divorced him, and married her new boyfriend.
 * Bart also mention about being married in Lisa's Wedding, but doesn't mention if Jenda was the woman there and their sons.

Goofs

 * In the description of the Sky 1 airing of this, there is a mistake saying it is the fifth episode of Season 23, not the ninth.
 * There are only 42 octuplets of the octuplets. If all of the octuplets had octuplets, there should be 64. This is either a goof or not all of them are there.