What does 一日 mean?
一日 is a Japanese noun meaning “first day of the month” in English. It is written as 一日 in kanji, ついたち in hiragana, and tsuitachi in romaji. This word is part of JLPT N5 vocabulary.
Note一日 is read いちにち when it means "one day".
Example sentences
来月の一日に会いましょう。
Let's meet on the first of next month.
毎月一日に家賃を払います。
I pay my rent on the first of every month.