生うまれ月づき

noun

birth month

Refers to the month in which someone was born. Used in contexts like school year grouping, astrology, or seasonal associations.

• 生うまれ月づきによって、同おなじ学がく年ねんでも年ねん齢れいが違ちがうことがある。

  Depending on one's birth month, ages can differ even within the same school year.