Plural of dateline; the lines at the beginning of news articles, letters, or dispatches showing the date and place of origin or publication.
From 'date' plus 'line'. The word became standard in journalism during the 19th century to clearly attribute where and when information originated.
International journalism relies heavily on datelines to establish credibility and context—a story datelined 'Kyiv, March 2022' carries very different weight than one from 'London, March 2022.'
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