Grammar › N4 · 11 Particles and endings, more
までに: by (deadline)
N4 · 11 Particles and endings, more
Marks a deadline: the action happens once, at or before that time.
Time + までに + one-off action. Contrast まで (continues up to): 五時までに帰る vs 五時まで働く.
Examples
金曜日までにレポートを出してください。
Please hand in the report by Friday.
七時までに帰ります。
I will be back by seven.