International dateline?

No countries. The line has been drawn to byp all countries. It runs the length of the world (0�-90� north and south of the equator.) The geographic significance is the dateline separates one day from another. A new day officially begins and ends there. Hours of daylight: 24 hrs above the Arctic Circle. 12 hrs at the equator. No daylight south of the Antarctic Circle on June 21st.