What is the ruling on a woman fasting the days of Eid al-Adha, including the day of Eid, to make up for days she missed in Ramadan?

It is not permissible to fast on the day of Eid al-Fitr, the day of Eid al-Adha, or the days of Tashreeq, which are the three days following Eid al-Adha. This is due to the prohibition of the Prophet, peace and blessings be upon him, against fasting on them, as they are days of eating and drinking. A wife's fasting on these days to make up for missed days of Ramadan is not permissible and will not suffice her, though there is no sin upon her if she was ignorant.