Using "Daylight Saving" appears to me as idiotic as crushing your feet in a vice to make them fit a pair of shoes.
If anything, **change activities timetable** , only on those needed of course (many couldn´t care less) instead of messing with *everything*, including biological clock and , let´s not forget it, Astronomical clock too.
Why create such an unnatural mess when whe can (MUCH simpler) say: "in winter, we work from 10 AM to 6PM instead of 9AM to 5PM" or whatever is necessary.
Result is exact same ... for those who need it, leaves all others untouched.