https://www.dailymail.co.uk/sciencetech/article-15257181/Arctic-blast-US-states-winter-DAYS.html
In Chicago if the PERMANENT daylight savings time passes into law, here is the foundational day and nightimes that would be and either end of the seasons…
https://www.facebook.com/photo/?fbid=1547805650042412&set=pcb.1547791753377135