を限りに

を限りに marks a boundary point—something ends at this point or from this point onward a new situation begins. It is often used in formal or official contexts to announce a deadline, the end of an ongoing policy, contract, or event, or a change in behavior after a specific moment. It conveys a sense of finality or turning point rather than a gradual change. The phrase is frequently used in written notices, speeches, or announcements and can carry a slightly authoritative or ceremonial nuance. Note that it normally attaches to a noun (the point in time or condition) and describes what happens at or after that point.