date line

American  

noun

1. International Date Line.

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date line British  

noun

1. (often capitals) short for International Date Line

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date line Scientific  

/ dāt /

1. The International Date Line.

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Etymology

Origin of date line

First recorded in 1875–80

Example Sentences

The short answer is that Mondays become Tuesdays at the international date line, a boundary that runs through the Pacific Ocean.

From New York Times • Apr. 24, 2024

Sports journalists and the Embassy of Japan become overnight experts on the international date line and travel logistics.

From New York Times • Feb. 8, 2024

DSV said it came upon the image’s location based on the 2010 “Date Line Theory,” which suggests Earhart’s exhausted navigator forgot to turn his calendar back a day after crossing the international date line.

From Seattle Times • Jan. 29, 2024

The volcano is about 40 miles north of Tonga’s main island, Tongatapu, near the international date line.

From Washington Post • Jan. 16, 2022

Only when we came to the international date line did my “in-between” feeling disappear.

From "Homesick" by Jean Fritz