Chickens don't have a laying season. They will lay all year, except to molt some time. All it takes is 14 hours of light. In the fall, when the light becomes less than 14 hours, they will start to stop laying. But if you put a light in the house, they will keep on laying. I don't now, as I am retired and don't want the work anymore. But up till the last couple of years I sold eggs year around with the same chickens. Of course after so many years they will stop. First they will go to about 1 egg every couple of days and keep getting less as the years go by. People in the business that only sell eggs change every couple of years, so they can be sure of an egg a day all the time. Hobby farmers like myself don't generally do that.