User blog comment:Thatsnotababyshow/Arthur: How assumptions and lack of knowledge caused an error that wasn't discovered for almost 2 decades/@comment-4604636-20160903081527

To be fair, the farthest back I can trace the September date is March 2005 on Wikipedia. At least everyone got the year right.

Also, going back to the discussion from this July, it is still possible that a few individual PBS stations did indeed show it on that date. Due to the nature of PBS stations, there are always some earlier or later than most of the rest.