970
xkcd #2846: Daylight Saving Choice
(imgs.xkcd.com)
Alt text:
I average out the spring and fall changes and just set my clocks 39 minutes ahead year-round.
https://www.historic-uk.com/CultureUK/British-Summer-Time/
In the UK it was brought in during the first world war as a method partly to save coal. Never had anything to do with farmers, but seems to have become a convenient explanation for it these days.