Keep the longer days where the sun can provide the most productive light and the environment can benefit too
The day is still only 24 hrs long. We just shifted the clocks so that we moved a hour of daylight from the morning to the evening.
As for 3rd shift workers, I have first hand experience, I just started a new job, working for the largest ag tractor manufacturer in the world, and any one working over the weekend clocked in and out after working the normal # of hours you were supposed to work and then the supervisor's had to make adjustments to the time sheets.
Another occupation that DLST makes a headache for is OTR drivers. Can only drive 11 hrs in 14 hrs and then need to take a 10 hr break. DOT regs state that when time change occur that a driver willnot change their clock time until after their 14hr on-duty time and then must take 11hr off-duty break.