Is it permissible to fulfill a vow to fast for a month by fasting on Mondays, Thursdays, and the White Days with the intention of fulfilling the vow, without recording the days that have been fasted?

If the questioner made a vow to fast a specific month, or intended to fast it consecutively, then breaking the fast is not permissible for her. However, if she made a vow to fast an unspecified month and did not designate a particular month, nor did she intend to fast consecutively, then she may fast it intermittently in any way, such as fasting on Thursdays, Mondays, and the white days until she completes thirty days. She must keep track of the number of days she has fasted.