Does collecting saliva and swallowing it break the fast?
Swallowing collected saliva does not break the fast, but it is an unnecessary and meaningless act.
Can someone who begins a voluntary fast break it?
It is preferable for someone who begins an act of worship not to break it.
Allah the Exalted has said {what means}: "and let not your [good] deeds come to nought!" [Muhammad/33].
However, if a person starts a voluntary fast (nafl) and needs to break it, they are going against what is preferable, but there is no sin upon them.
What is the ruling on one who vows to fast a specific or non-specific year? Are the two Eids, the days of Tashreeq, Ramadan, and the days of menstruation and postnatal bleeding included in them? And do these days break the consecutiveness if it was intended?
Praise be to Allah, and peace and blessings be upon our Master, the Messenger of Allah.
If someone makes a vow (Nadr) to fast a specific, designated year, this vow does not include the days of Eid, the days of Tashreeq (the three days following Eid al-Adha), Ramadan, or the days of menstruation (Hayd) and postnatal bleeding (Nifas). Furthermore, there is no requirement to make up (Qada) these specific days.
However, if someone vows to fast a year that is not specifically designated (i.e., any twelve-month period) and stipulates that the fasting must be consecutive, they are bound by that condition. They must not fast on the days of Eid, during Ramadan, or during menstruation, but they are required to make up these days afterward—with the exception of the days of menstruation and postnatal bleeding, which do not need to be made up.
It is stated in Hashiyat al-Bajuri ‘ala Sharh Ibn Qasim ({Vol.2/P.606): 'If one vows to fast a specific year, the Eid, Tashreeq, Ramadan, and days of menstruation or postnatal bleeding are not included. This is because Ramadan does not accept any fast other than its own, and the others do not accept fasting at all. Therefore, they do not enter into the vow, and no makeup is required for them because they are legally excluded—contrary to Al-Rafi’i regarding menstruation and postnatal bleeding.
If one vows to fast a non-designated year: if they stipulated consecutiveness (Tatuabu’) in their vow, they must fulfill it; otherwise, they are not bound to it. Consecutiveness is not broken by the days that do not enter into the specific year vow (Eid, Tashreeq, Ramadan, menstruation, and postnatal bleeding). However, one must make up the days missed—excluding the time of menstruation and postnatal bleeding—immediately following the end of the year. As for the time of menstruation and postnatal bleeding, it is not made up, contrary to Ibn al-Rif’ah, who argued that it must be made up just like Ramadan.' And Allah the Exalted knows best.
Is it a condition that one should offer two sacrifices for a male newborn?
It is desirable to offer two sheep for a male newborn, and one for a female newborn. Offering one sheep for the male newborn is also permissible as it observes the Prophet`s Sunnah in this regard.
