届时 (jiè shí): By that time / At the time (Adverb) — Meaning & Stroke Order

The project is expected to be completed by the end of June, at which time we will hold a grand launch event.

Are you sure you can arrive at the airport on time by then? The flight won't wait for anyone.

We plan to travel next month, and the weather should be nice at that time.

Although I really want to attend your wedding, I'm afraid I won't be able to get away to go by that time.

After the new policy officially takes effect, we will then adjust the plan based on the specific situation at that time.

The company will hold an annual meeting at the end of the year, and all employees will receive invitations at that time.

Don't forget about the dinner gathering next week; remember to bring me the book you borrowed last time then.