届时

• 拼音: jiè shí
• 汉字拆解: 届 = 尸 + 由 — to arrive at, session; 时 = 日 + 寺 — time

含义

At that time; when the time comes. Referring to a future time already mentioned or understood.

A formal expression used in written Chinese and official announcements to refer to a specified future time. Often used in invitations, schedules, and formal notifications. More formal than 到时候.

例句

1. 会议定于下周五举行，届时请准时参加。
2. 新系统将于明年一月上线，届时所有用户需重新注册。
3. 活动当天可能会下雨，届时请带好雨具。

用法指南

语境: announcements, invitations, scheduling

语气: official

正确说法

• 届时欢迎大家参加。(You are all welcome to attend at that time.)
• 届时我们会通知您。(We will notify you when the time comes.)

错误说法

• 在口语中用'届时'代替'到时候' (Don't use 届时 instead of 到时候 in casual speech — it sounds too formal)

起源与历史

Composed of 届 (session; period; to arrive at) + 时 (time). Together they refer to the arrival of a specified time.

文化背景

世代: All ages

社会背景: Formal contexts