Yup, but like @Akl500P said, it's the one thing they *didn't* change & thought it was funny . Though usually companies will update the copyright info every year.
That date is tied to a legal document, renewed every so often, maintaining copyright to their product. Part of that legality includes the requirement to actually say the material is under copyright (the circle c denotes that) with the name of the copyright holder, and the most recent date of renewal. It doesn't change because the art does.
TL:DR - not a mistake. It's a legal thing and that is how it works.
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TL:DR - not a mistake. It's a legal thing and that is how it works.
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