日付変更線(ひづけへんこうせん)

ひづけへんこうせん
noun
International Date Line
geographytime-general
1. International Date Line
The imaginary line, roughly along the 180th meridian in the Pacific, where the calendar date changes by one day.
日付変更線(ひづけへんこうせん)を越(こ)える。
To cross the International Date Line.
飛行機(ひこうき)が日付変更線(ひづけへんこうせん)を通過(つうか)した。
The plane passed over the International Date Line.
Flying from Japan to Hawaii crosses the International Date Line, so you may arrive on the morning of the day you left.

Etymology

日付(ひづけ) (date) + 変更(へんこう) (change) + 線(せん) (line).

Common collocations

Usage

Crossing eastward (Japan to America) repeats a date; crossing westward skips one. The full official name 国際(こくさい)日付変更線(ひづけへんこうせん) is seldom used.