But with nearly 700 episodes aired, there are a few continuity errors in the timeline, including flashback episodes showing Homer and Marge meet for the first time as teenagers in the 70s, then again in the 90s with Homer starting a grunge band.
The show's history has been rewritten once more last weekend, with the latest episode showing Homer as a teenager in the 90s.
Fans have pointed out what this means for the characters ages, with one tweeting: "Homer was now a teenager in the late 90s, meaning his hypothetical birthday is later than Bart's was at the start of the show.
"Homer is now younger than Bart."
"...this means Maggie (who wasn't born) didn't shoot Mr. Burns. Perhaps it was the young 90s kid Homer," another added.
"Abraham Simpson fought in World War II, they literally can't be doing this," someone else tweeted.
Simpsons executive producer Matt Selman responded to the fans saying: "Continuity Alert: Sunday's @TheSimpsons playfully re-interprets the show's timeline to allow Homer to be a teenager in the early '90s.
"The Simpsons is a 32-year-old series where the characters do not age, so the 'canon' must be elastic / contradictory / silly. This does not mean other beloved classic @TheSimpsons flashback shows didn't happen.
"None of this happened. It's all made up. Every episode is its own Groundhog Day that only has make sense for that story (if that)," added the producer.
"There is no @TheSimpsons 'canon' or 'non-canon.' There are only stories. If all these crazy things really happened to one family the characters would be in a mental hospital.
"If you love, hate or are completely indifferent to our Silly Putty paradoxical continuity, thank you so much for watching / caring about @TheSimpsons at any point in its 100000 years of existence."
Since the show started in 1989, the characters have been the same age with Homer and Marge in their 30s, while Bart and Lisa are 10 and 8 respectively, and Maggie forever being one.
The Simpsons is now available to watch on Disney+ in the US and the UK.
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