The Moon transits Sagittarius for roughly 2.5 days every month — the shortest lunar visit of any sign. It's fast, loud, and physical. You feel it in your legs before your head: the urge to move, drive somewhere, book something, say the thing out loud that you've been editing for a week.
The shift
Here's the definitive shift: Moon in Sagittarius collapses the gap between what you feel and what you say. Water-sign moons metabolize emotion privately. Sagittarius doesn't. Truth leaves the mouth before diplomacy catches it. Relationships get tested, plans get made impulsively, and boredom becomes intolerable. This isn't a 'feel your feelings' transit — it's a 'act on them' transit.
When it hits hardest
The progressed-chart amplifier: this hits hardest when your progressed Moon is sitting in a water or earth sign, because the contrast is sharp. For the reference chart with progressed Moon in Pisces in the 7th house VII, a Sagittarius transit Moon cuts through Piscean fog like a blade — suddenly you see what the relationship actually is, not what you've been imagining it to be. Couples either get honest or get distant during these 60 hours.
What to do
What to do: move your body, finish the uncomfortable conversation, and don't sign anything. Sagittarius Moon is excellent for truth-telling and terrible for contracts. Book the flight, quit the group chat, call the person you've been avoiding. But hold off on commitments until the Moon enters Capricorn . Your gut is accurate right now. Your long-term judgment isn't.
Common misread
Common misread: people confuse this transit with 'being in a good mood.' It's not optimism — it's exposure. The Sagittarius Moon doesn't make you happy, it makes you honest. If your life is built on a polite lie, these 2.5 days will feel like a problem, not a vacation.