N5 — outside your level filter
までに
までにmade niN5neutral
Same meaning2
before doing; by the time
All examples4
by the time; no later than — happens once, not stretched out
明日出るまでに、部屋を片付けてね。
ashita deru made ni, heya o katazukete ne.
Tomorrow, by the time you leave, tidy up your room, okay? casual
今月末までに、レポートを提出しなければならない。
kongetsumatsu made ni, repooto o teishutsu shinakereba naranai.
I have to submit the report by the end of this month. neutral
五時までに戻ってきてね。
goji made ni modotte kite ne.
Be back by five, okay? casual
恐れ入りますが、来週金曜日までにご返信いただけますでしょうか。
osoreirimasu ga, raishuu kin'youbi made ni go henshin itadakemasu deshou ka.
I'm sorry to trouble you, but could you reply by next Friday? formal
How it's formed2
Notes
Drop the に and まで alone means a plain "until," not a deadline.