What does 何日 mean?
何日 is a Japanese expression meaning “how many days” in English. It can also be translated as “how many days” depending on context. It is written as 何日 in kanji, なんにち in hiragana, and nannichi in romaji. This word is part of JLPT N5 vocabulary.
Example sentence
何日滞在する予定ですか。
How long are you going to stay?