一いち日にち

noun, adverb

one day; a day

Refers to a single day as a unit of time or a specific day. Can be used adverbially.

• 一いち日にちに三さん回かい、薬くすりを飲のむ。

  I take the medicine three times a day.

• この仕し事ごとは一いち日にちで終おわる。

  This work will be finished in one day.

adverb, noun

all day; the whole day; from morning till night

Only with reading いちにち

Emphasizes the entire duration of a day. Restricted to the reading いちにち.

• 昨日きのうは一いち日中にちじゅう雨あめが降ふっていた。

  It rained all day yesterday.

• 彼かれは一いち日にち働はたらきづめだった。

  He worked the whole day without a break.

noun

first day of the month

When read as ついたち, this meaning is standard. With the reading いちにち, it is less common and may be used in contexts like deadlines or schedules. See also １日 (ついたち).

See also: １日 (ついたち)

• 来らい月げつの一日ついたちが締しめ切きりです。

  The deadline is the first day of next month.