になるまで

until ... becomes

→ に
phrase Uncommon #14,815
until ... becomes Used for waiting or continuing until someone or something reaches a certain state, condition, or age.
JA: 桜が咲く季節になるまで待ちます。
EN: I'll wait until it becomes cherry blossom season.

かなり最近になるまでは、私たちが必要とするものはほとんど手で作られていた。

Until fairly recently, most of what we needed was made by hand.

生徒たちは試験の直前になるまで本気になって勉強しない。

The students don’t get serious about studying until just before the exam.

彼は名優になるまでに―どれだけ殴られたのか何度打たれてもいい

How many times was he beaten before he became a great actor? It doesn’t matter how many times he gets hit.

— さらば、わが愛/覇王別姫 (1993)

私たちは満腹になるまで食べた。

We ate until we were full.

統計によれば百歳になるまで生きる人はほとんどいない。

According to statistics, very few people live to be one hundred.