date line

(noun) an imaginary line on the surface of the earth following (approximately) the 180th meridian. Synonyms: dateline, International Date Line.

(noun) a line at the beginning of a news article giving the date and place of origin of the news dispatch. Synonyms: dateline.

(verb) mark with a date and place. Synonyms: dateline, datemark, date-mark. Example: "Dateline a newspaper article."