It does indeed work well for those closer to the poles. It was of course, as mentioned, mostly for agricultural purposes but these days it serves an actually pretty good unintended purposes. Less car accidents due to higher visibility during after work traffic. I read somewhere that if it was removed the estimated extra motor vehicle accidents would rise not unsignificantly.
Extra time for kids (and adults) to get some extra vitamin D is likely a pretty good side benefit as well.
On a related topic... I was wondering why I felt so exhausted today seeing as how I got up at my usual "sleep in" hour (which is 9am and has infuriatingly been occurring more often than I like these days). Totes forgot about the time change. Is good though because hopefully I'll be tired enough to actually pass out at my desired "old lady" bedtime.
/old lady