What is the ruling on fasting on the Day of Doubt and the Day of Eid when making up for the expiation of accidental killing?

It was previously mentioned that fasting on the day of Eid is not permissible, and breaking the fast on that day does not interrupt the continuous fasting. Similarly, fasting during Ramadan does not interrupt the continuity according to the Hanbalis, which is the preferred view.

As for menstruation, it does not interrupt the continuity of fasting according to the majority of jurists, due to its incompatibility with fasting and its necessity for women.

Fasting on the 'Day of Doubt' (Yawm al-Shakk) is not legislated according to most scholars, except for those who have a regular habit of fasting or who fast continuously as a supererogatory act. The Malikis have explicitly stated its permissibility for customary fasting, supererogatory fasting, qada' (making up missed fasts), expiations, and vows.

Based on this, if one fasts on the 'Day of Doubt' as part of an expiation, their continuous fasting is not interrupted. According to the Hanbali view, the questioner should build upon the fasts she observed before Ramadan and complete the remaining fasts after the day of Eid al-Fitr.