公こう開かい日ひ

also: こうかいひ

こ

う

か

い

び

Meanings

noun

release date; publication date; opening day

Refers to the date when something becomes publicly available, such as a movie, game, book, or event. Can also mean the first day a facility or service opens to the public.

新しん作さく映えい画がの公こう開かい日びは来らい月げつの金きん曜よう日びです。
The release date for the new movie is Friday next month.
この美び術じゅつ館かんの公こう開かい日びはまだ決きまっていません。
The opening day of this museum hasn't been decided yet.

Written forms

公開日
- こうかいび
  Standard kanji spelling. The reading こうかいび is more common than こうかいひ.
- こうかいひ
  Alternate reading; less common but still used.
こうかいひ

Kanji

公public, prince, official
開open, unfold, unseal
日day, sun, Japan

Similar words

発はつ売ばい日び
発売日 is specifically for the date a product goes on sale, while 公開日 is for when something is made publicly accessible (e.g., a movie, event, or facility).
開かい設せつ日び
開設日 refers to the establishment or founding date of an organization, facility, or system, often with a more formal or administrative nuance than 公開日.

Etymology

Compound of 公開 (こうかい, 'public opening, release') and 日 (ひ/び, 'day'). The reading こうかいび is a standard rendaku (sequential voicing) form.