quarter of

Noun

dated uncountable

(dated) Synonym of quarter to; fifteen minutes before a certain hour.

Japanese Meaning

15分前（特定の時刻の15分手前、つまり“quarter to”と同義の表現で、古い用法として用いられる）

He arrived at quarter of seven, which felt unusually early.

彼は7時15分前に到着し、いつもよりかなり早く感じた。

Sense（1）

(dated) Synonym of quarter to; fifteen minutes before a certain hour.

"It's 2:30 now; let's meet in 15 minutes." "Okay, see you at quarter of."