The Aleutians Cross the Longitude Divide
Longitude measures how far a place lies east or west of the prime meridian, which runs through Greenwich, England. At 180 degrees, east and west meet on the opposite side of the globe. Alaska’s Aleutian Islands stretch across that line: islands farther west are measured with west longitude, while islands just across the divide are measured with east longitude.
That makes Alaska’s claim a matter of coordinates, not a trick of wording. Its far-western islands reach nearly to 180 degrees west, and the islands on the other side reach nearly to 180 degrees east. By longitude, the state extends into both hemispheres.
Why the Date Line Bends Around the Islands
The International Date Line generally follows the 180th meridian, but it bends around inhabited places and political boundaries so nearby communities can keep the same calendar date. In the Aleutians, that means the date line does not trace the state’s boundary or neatly divide Alaska from the rest of the United States. The longitude line and the date line are related, but they are not identical.
The result is a geographic quirk with a practical twist: a short distance across the Aleutian chain can also mean crossing into a different calendar day. Alaska’s easternmost and westernmost distinction comes from the islands’ position on either side of the globe’s longitude divide.
