no, you do not have to heat your chickens coop. all you have to do if extend your chickens daylight hours. i usually have my lights timed to come on at 7am and then turn off at 8pm.
There are more hours of daylight in a day during summer than there are in winter.
Winter
Winter begins on June 21, and over most of the Antarctic continent, there are no sunrises during winter.
There is always more daylight during the summer months, which is what makes them summer months. Note, of course, that when it is summer in one hemisphere, it is winter in the other. Total daylight on earth overall varies little from day to day or season to season.
Winter brings the shortest days and the least daylight ... in either hemisphere.
Less daylightALI
to save daylight in the winter
Antarctica receives zero hours of daylight in the winter.
Most of the sunlight is during summer but during winter it probably averages 3-4 hours of sunlight a day.
During the winter, the month of December will peak to a low of 8 hours of daylight. During the summer, the month of June will peak to a high of 18 hours of daylight
At the North Pole, there is daylight all day, every day during summer, and no daylight most of the winter. However, Santa is magical, so everyone has light when needed, and they have big indoor parks with sunlamps so they can go have a picnic in the middle of winter if they want to.
the daylight time is longer in the summer and shorter in the winter