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.
Daylight in Anchorage will peak Friday at 19 hours, 21 minutes on the summer solstice. (AP Photo/Dan Joling) The June solstice is here once again, marking the longest daylight period of the year and the start of astronomical summer in Earthâs northern hemisphere.