What does 誕生日 mean?
誕生日 is a Japanese noun meaning “birthday” in English. It is written as 誕生日 in kanji, たんじょうび in hiragana, and tanjoubi in romaji. This word is part of JLPT N5 vocabulary.
Example sentence
今日は、妹の誕生日です。
Today is my sister's birthday.