date-line
n
(a) (also international date-line) imaginary line running from north to south 180 from Greenwich, east and west of which the date differs by one day (国际)日界线(距格林威治180自北向南的一条假想线, 此线以东及以西的地区日期相差一日).
(b) line in a newspaper above an article, etc, that shows the time and place of writing 日期行(报章中一篇文字上方注明撰写时间和地点的一行文字).