During the winter II put a light on a timer so they had 14 hrs. They began laying so many eggs I couldn't sell all of them, so I turned off the timer. After a few weeks my demand had grown, so I turned it back on. Nothing happened!
What @Folly's place and @aart said.
I add light in the morning, 5 am year round.
I don't add light in the afternoon/evenings.
So when Daylight savings time and Standard time changes happen here. I gradually transition to the new time, over 3 to 4 days.
Starting on Friday through Monday (Spring).
Saturday through Monday (Autumn).
Has worked for me, increasing/decreasing light 15 to 20 minutes a day.
It had no effect on my pullets/hens egg production.
Of course I only changed the available light by an hour.
So to answer your question, changing available light 15 to 20 minutes a day, (up to an hour a week), till you get to the amount of light you desire, will be less stressful for your chickens than suddenly adding/subtracting hours of light all at once. GC