期日（きじつ、kijitsu）
- due date

The Japanese word 期日 (きじつ, *kijitsu*) primarily means "due date," "deadline," or "specified date." It refers to a particular date or time by which something must be completed, submitted, or achieved. It often implies a deadline imposed by rules, agreements, or expectations. The term emphasizes the importance of adhering to a schedule. The meaning of 期日 can vary depending on context; sometimes it can simply indicate a "period" or "term" associated with a specific event.

⚫︎提出期日は来週の金曜日です。 Translation: The submission deadline is next Friday. ⚫︎契約の期日が迫っています。 Translation: The contract deadline is approaching. ⚫︎支払期日までにお支払いください。 Translation: Please pay by the payment deadline.

You can use 期日 in formal and informal situations. It's especially common in business, legal, and academic contexts. It is a more formal term compared to some synonyms. It's appropriate when discussing deadlines for assignments, payments, project completions, and other time-sensitive matters.

期日 is typically written in kanji. The reading is きじつ (hiragana). There are no other common ways to write this word. The okurigana is standard.

⚫︎締め切り (*shimekiri*) - deadline ⚫︎期限 (*kigen*) - deadline, time limit ⚫︎納入期日 (*nouyuu kijitsu*) - due date for delivery ⚫︎完了期日 (*kanryou kijitsu*) - completion date

It's not straightforward to provide direct antonyms, but you can think of terms that suggest a lack of a deadline. ⚫︎無期限 (*mukigen*) - indefinite period ⚫︎未定 (*mitei*) - undecided, undetermined (regarding a deadline)

レポートの提出期日は、5月15日です。 ・Translation: The submission deadline for the report is May 15th. ・Explanation: This sentence clearly states the 期日 (deadline) for submitting a report.

このプロジェクトの完了期日は来年の3月です。 ・Translation: The completion deadline for this project is next March. ・Explanation: This sentence sets the 期日 (deadline) for the completion of the project.

The word 期日 is formed from two kanji: 期 (*ki*) which means "period," "time," or "term," and 日 (*nichi*) which means "day" or "date." Together, they combine to create the meaning of a specific time or day allocated for something.