Note: Even though this episode, along with its accompanying episode Momnipresent, was aired during Season 7, it was produced during and considered a part of Season 6.
This is the second episode relating to Timmy's birthday, the first being Boys in the Band.
The age that Timmy is turning is never actually mentioned in this episode, however, in previous episodes, Timmy mentioned he was 10, and today is his legitimate birthday, it's very safe to assume that Timmy officially turns 11 in this episode.
However, in Timmy's Secret Wish!, it was revealed he stopped everyone from aging, so he might still be 10, but no one else knows.
Adam West is shown acknowledging the existence of fairies. This could mean either crazy people are allowed to know about fairies since no one would believe them, or he was hypnotised and his mind was wiped after filming was done.
This is the first (and final) time Chris Kirkpatrick does the role of Chip Skylark since "Chip Off The Old Chip". He, as Chip Skylark, briefly sang the song "Happy Birthday, Timmy!" at the end of the episode.
This is Chip Skylark birthday too, which could be the reason he returns and the reason he remembered Timmy's birthday since "Boys in the Band".
Apparently, Vicky remembers Timmy's birthday better than his own parents.
In one scene, Timmy's nose appears pointed, as Cosmo and Wanda's, not rounded, as it usually is.
Timmy says that there's nothing in his room that can prove that it's his birthday, but right behind him, there was in the wall a calendar, written "my birthday".
Timmy already knows that he has until he is eighteen years old to keep his fairies, according to "Channel Chasers".
The irony in the losing fairies concept when growing up is that in Channel Chasers stated that one grows up and is too old to believe in fairies, they have to go away. But in this episode, it was treated like if Timmy turned a year older, he would lose them. Though in the end it was casted aside due to the usual nature of Timmy's parents and Vicky's cruelty.
In Apartnership, Cosmo and Wanda's anniversary is on the same day as Timmy's parents. In this episode, Timmy's birthday is on the same day as his parent's anniversary. However, Timmy's birthday is not mentioned in Apartnership, even though it was his birthday. Also, Cosmo and Wanda didn't celebrate their anniversary in this episode, even though is was their anniversary.
However, given the nature of Timmy's parents, it's very possible that it wasn't their anniversary and forgot the actual date of their anniversary, celebrating it on a different day then the actual anniversary.
When Timmy says he will never lose his faries the clown passes his house but the clown was supposed to go to Timmy's house.
When Timmy's eating his strawberry birthday cake from Vicky, the birthday cake is not taste strawberry again, but taste chocolate.
Chip Skylark's shoe outlace doesn't have "Chip" written on it like usual.