Okay so I saw a previous post going on about Danny’s age/school year and one person said that someone needed to make a timeline. I ATTEMPTED to in order of the episodes and it makes NO SENSE. But here. Maybe you guys can come up with some conclusion. So let’s just…
There’s also the slight possibility Butch Hartman planned it that way.
Danny Phantom takes place in the same universe as Fairly Odd Parents as has been shown by several episodes of FOP where wanted ads for Danny have shown up on TV, or he shows up on a ghost radar, or there’s an advertisement for a Danny Phantom comic book.
In one of the episodes of FOP, I can’t remember the name, we find out that Timmy wished secretly that he could keep Wanda and Cosmo forever, and for that wish to come to pass then he could never grow up.
Everyone in that universe was stuck at their current age for fifty years until the wish was cancelled and everyone instantly gained fifty years of age.
Nobody seemed to notice the apparent lack of aging either, and still celebrated holidays normally.
If that’s so, there’s a possibility that Danny and gang are also stuck in this anti-aging universe, which would explain the time abnormalities .
I know we do see DP characters at different ages, such as Future Danny, but we don’t really see any aging between then. The closest thing to aging in Danny Phantom is the art changing between seasons where Danny slowly gets smaller eyes and mouth.