By Tom Spears, Ottawa Sun, August 28, 2017
Only twice a year — the start of spring and the start of fall — does the change of season happen so quickly.
And the changing position of the sun in our sky is the reason.We’re now losing more than three minutes of daylight every day, a major shift since the beginning of summer when the daily change was only a few seconds.
http://www.ottawasun.com/2017/08/28/science-of-late-summer-why-it-suddenly-feels-like-fall