No, it really doesn't. There are x number of daylight hours. Calling them different numbers makes no difference to that.
Farmers need to feed the stock in the hills. That means taking a load up a steep hill in winter - sometimes hairy at the best of times, given the climate.
Add on trying to do it in low light conditions and the problem's even worse.
Sheep don't live by the clock, but by the light level, and if the first feed they get is at nine thirty, then that can cause premature abortion.
The only alternative is to bring the whole flock into a barn....but if you're dealing with a flock of over a thousand, you need a bloomin' big barn!
Last year, several farmers were injured on the hills in daylight. Can you imagine how many more would suffer broken limbs in the gloaming before full light over the hills at ten o'clock?