Unit 120 Союзы и предлоги: by/until/by the time — «до указанного времени»

I have to be at home not later than 5 o’clock. — I have to be at home by 5 o’clock.

I have to be at the airport not later than 10.30. — I have to be at the airport by 10 30.

Let me know not later than Saturday whether you can come to the party. — Let me know by Saturday whether you can come to the party.

Please make sure that you’re here not later than 2 o’clock. — Please make sure you’re here by 2 o’clock.

If we leave now, we should arrive not later than lunchtime. — If we leave now, we should arrive by lunchtime.