revision preference src: Fairbanks receives an average 21 hours of daylight between May 10 and August 2 each summer, and an average of less than four hours of daylight between November 18 and January 24 each winter. <SEP> tgt: It is light for about 21 hours every day between May 10 and August 2. <SEP> It is light less than four hours each day between November 18 and January 24.