Presumed mayor-for-life Rahm Emanuel has declared September 23 David Bowie Day in Chicago, a day when all the beautiful kooks and far-out cats of the Midwest can really groove on the serpentine vibes of a moonage freakout. The event coincides with the opening of David Bowie Is… at the Museum of Contemporary Art Chicago, a multimedia overview of Bowie’s half-century career that includes items like handwritten lyrics, photographs, original costumes, and presumably glittery underpants from Bowie’s personal archives.