おそくまで

until late; until a late time

→ 遅い
phrase Rare #40,644
until late; until a late time Often written 遅くまで. The specific time is understood from context.
JA: 私は彼と夜おそくまで話し合った。
EN: I talked things over with him until late at night.

おそくまで

until late

— 東京物語 (1953)

私こんなにおそくまで外出歩いたことないわい。

I've never stayed out this late before.

私は彼と夜おそくまで話し合った。

I discussed things with him until late at night.

おそくまで外出していた言い訳をする。

I make excuses for staying out late.