+The 180th Meridian is Earth's line of [Longitude](/wiki/Longitude) directly opposite the [Prime Meridian](/wiki/Prime_Meridian). It largely traces the [International Date Line](/wiki/International_Date_Line) through the Pacific, marking where calendar days shift.
+## See also
+- [Meridian](/wiki/Meridian)
+- [Prime Meridian](/wiki/Prime_Meridian)
+- [International Date Line](/wiki/International_Date_Line)
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