Is the fasting expiation for killing by the month or by the number of days?

Question:
This questioner says: Honorable Shaykh, I have to fast two consecutive months as expiation for accidental killing. Is it required that I fast from the beginning of the month, or from the middle of the month? And does it have to be sixty days, not less, according to the month?

Answer:
You fast by the number of days because you do not see the crescent moon, so you fast for sixty days. You can start at the beginning of the month, in the middle of the month, or at the end of the month. The important thing is that you fast for sixty consecutive days. Yes.