Yoma 6a Mikva Schedule (Dirshu Amud Yomi #291)

The episode explores a nuanced Talmudic dilemma from Yoma 6a: why a Kohen Gadol (High Priest) must separate from his wife before Yom Kippur, even though he’s not yet in a state of ritual impurity. Rabbi Eli Markowitz explains that the concern isn’t just about the wife becoming a Nida (menstruant) after intimacy, but specifically about the possibility that she was already a Safek Nida (doubtful menstruant) within the previous 24 hours—especially if the encounter occurred just before she saw blood. The Gemara distinguishes between two scenarios: one where blood appears immediately after intercourse (Bishas Tashmish), which creates a real concern of impurity, and another where blood appears later, which is governed by different halachic rules. The key insight is that the Kohen Gadol must be separated by Beis Tishrei (the second of Tishrei) in the afternoon before sunset, creating a seven-day buffer to ensure he can immerse in the mikveh by nightfall on Erev Yom Kippur. This timing ensures he is fully Tahor (pure) by the time Yom Kippur begins, even if his wife was a Nida during the week. The discussion also contrasts the halachic status of a Boney (a Kohen who is a Nida) with a Tommy Mace (a regular Tameh person), highlighting that while both are impure for seven days, the Boney is considered more humble due to his physical condition, allowing him to begin counting his days earlier without needing a buffer.