Tropic of Capricorn
Tr. of Capricorn
Southern tropic, 23.4° S.
Circle of latitude
Tropic of Cancer
Tr. of Cancer
Northern tropic, 23.4° N.
Equator
An imaginary line equidistant from the north and south poles
Arctic Circle
Arctic Cir.
Northern polar circle, 66.5° N.
Antarctic Circle
Antarctic Cir.
Southern polar circle, 66.5° S.
International Date Line
Date Line
Any given day starts here and progresses west, with yesterday nipping at its heals
Date line