It's the length of daylight that will prompt them to start laying again.
That will start to increase here in a week, tho it may take another few weeks for it to produce eggs.
Mine are.
I had six 9mo pullets all laying....changed out the coop bedding and it freaked them out.
Feed consumption went way down for 3-4 days, the eggs about stopped and then they started molting. Of the 3 that weren't phased by the new bedding, 1 went broody and hasn't started laying again...