The Ruling on the Fasting of a Young Girl and the Age of Obligation for Fasting for a Woman

Question:
When does the fasting of Ramadan become obligatory for a woman, specifically for a young girl? When is she ordered to fast as an obligation?

Answer:
In any case, a young person who has not reached puberty, whether male or female, is ordered to fast if he or she is able to do so, in order to practice it, even though it is not obligatory upon them. However, they are ordered to do so to practice it and to grow up with it, just as the righteous predecessors used to order their children to fast so they would practice it. And if they asked for some food or drink, they would give them something to keep them occupied until the time for breaking the fast. All of this is for the sake of training them. As for the one who has reached the age of maturity, whether male or female, fasting is obligatory upon him or her and it is required of them. Specifically, when a woman reaches the age of legal responsibility, she is like a man; fasting and other obligatory duties are required of her, and all that is forbidden is forbidden to them. The minimum age at which a woman reaches puberty is nine years. So, if she menstruates at nine years of age, she has reached puberty, and she is ordered and required to fast when she menstruates. The minimum age at which a girl menstruates is nine years. Yes.