n. 1  1. An inborn pattern of behavior that is characteristic of a species and is often a response to specific environmental stimuli: the spawning instinct in salmon; altruistic instincts in social animals. 2  2. A powerful motivation or impulse. 3  3. An innate capability or aptitude: an instinct for tact and diplomacy.
Daylight Hours: 16 hours, 15 minutes (-6m 51s) The Sun's altitude in Fairbanks today. The horizontal line signifies the horizon, the vertical lines show the times of sunrise and sunset. Altitude and heading are displayed in the box on the right. The graph defaults to current time.
Over the course of September in Fairbanks, the length of the day is very rapidly decreasing. From the start to the end of the month, the length of the day decreases by 3 hours, 13 minutes, implying an average daily decrease of 6 minutes, 39 seconds, and weekly decrease of 46 minutes, 35 seconds.