Question: what days are chicago museums free?
Answer: Adler Planetarium: January 7-9, 20-22. February 4-6, 11-13, 17-20. ... , Field Museum: January 8, 15, 20, 22, 29. February 1-29. ... , Museum of Science and Industry: January 6-9, 13-16, 20-23, 27-30. ... , Shedd Aquarium: January 16-20.