though, would only lose about 4 hours. so… why does any of this matter? as your area starts to receive less and less daylight, the window in which you can safely and comfortably run outside will gradually close. will you may have been able to run later in the day during the summer, you may not be able to maintain that practice in the fall.
instead, your runs will like have to move up a few hours. or, you may have to completely change your habits by running in the morning instead of the evening. while this might not seem like an important point, these changes could make a major difference 