The image's surrounding looks more like 8:00 PM + and not 3:42 PM.

9:52 PM tweet on 25 June, Chicago is the 1st degree of end astronomical twilight and the halfway point between end civil twilight and end astronomical twilight - 48.5 minutes for a total 97 minutes. I wouldn't think that's necessarily unusual except that the surrounding environment doesn't appear to match with the time of day per clock tower.

Wrigley Clock Tower is modeled after Giralda Tower, Seville, Spain. https://www.govisitchicago.com/product/chicago-wrigley-building-clock-tower-and-tribune-tower-framed-poster/ Giralda is recognized as official burial place of Columbus (mostly).

Exotic: It's said that Columbus had access to Piri Reis map.

Exotic: Perhaps 48 points to Antarctica. There is a documentary titled The Secret Land (1948) about Operation High Jump. It's available on Youtube and roughly 1 hour and 10 minutes in duration.