User blog comment:RRabbit42/Birth and death dates/@comment-961279-20120505174754

A final note before closing this blog. In some cases, the false information was probably added just because they wanted to create that information and didn't think they were doing any harm. In the rest, it was a type of vandalism. A lot of it has been cleaned up, but there may still be some left in the pages for the family members seen in the Simpsons family tree.

Because it is now an established fact from Matt Groening that the characters don't age even though we see modern references such as a picture of President Barack Obama, any time there is a specific date or age added to a character, it's pretty much guaranteed to be fan fiction and needs to be removed.