Matt Groening once explained that each episode takes place in one day, one 24 hour period
Each year a 26 episode season /series is released
So calculate long to make a 365 day year from those
So they stay the same ages for that reason
However they need the sliding timeliness
So ten years go past for us and it's 9 months for them
So mobile phones, the Internet, the current President, need to be updated
And Abe who originally served in WW2 now has to have served in a later war
Or not at all, if he imagined it
