My email message to the Museum of Science and Industry:
A panel in the Henry Crown Space Center near the mockup of the Lunar Module refers to "Saturday, July 20, 1969." The lunar landing actually occurred Sunday, July 20, 1969. --Ken Salkover
The response from staffer Hilary Fruin:
Kenneth: Thank you for your e-mail. I've forwarded your message to the exhibit manger and graphic design team for their review/action. We look forward to your next visit! Happy holidays.
[Me again] If MSI ends up correcting the panel on my account, I think it should send me a complimentary one-year membership.