When you save minimum night rules in Guesty, they apply to bookings immediately, even if your website calendar does not show them yet.
Why this happens. Minimum nights are enforced at the booking level. Guesty refuses to provide a quote for stays shorter than the minimum, so guests cannot complete a booking below the minimum even before the website calendar updates. The website calendar itself picks up the rules on its next sync with Guesty, usually within a few hours.
What guests see after the sync. If a guest selects a check-out date inside the minimum, the calendar shows a message like "Can’t check out, this home requires a 7 night minimum" and offers the shortest allowed stay instead.
No website setting needs to change.