日にち・日日|ひにちhinichi[0]heiban (flat)

1. noundate (of a planned event, act, etc.); day
   会合かいごうの日ひにちと場所ばしょが決定けっていされた。↗

   The date and place of the meeting have been fixed.
2. noun(number of) days

• Synonym日付ひづけNeutralThe date shown on a calendar or written on a document, as in 「日付が変わる」 or 「日付を入れる」; 「日にち」 also covers counting days.
• Synonym日取りひどりNeutralThe day chosen or fixed for an event or ceremony, as in 「結婚式の日取り」; 「日にち」 is broader in scope.
• Synonym日ひNeutralA single day or days in general, and also the sun; 「日にち」 centers on dates and day counts.
• Related期日きじつWrittenWritten/formal prose for a date set in advance or a deadline, as in 「期日までに提出」 or 「裁判の期日」; 「日にち」 is more everyday.
• Related日時にちじNeutralDate plus time, as in 「集合日時」; 「日にち」 covers a date or a number of days but never the time of day.

In speech, 「日にち」 is the default for a date or a number of days. Use 「日付」 for the date on a document or calendar, 「日取り」 for a chosen event day, 「期日」 for set dates or deadlines, and 「日時」 when the time matters too.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 日ひ。日数にっすう。
2. 日ひ。日付ひづけ。