到时候 (when the time comes)

• Pinyin: dào shíhou
• Formation: ……，到时候 + ……
• Hanzi breakdown: 到 = 至 (arrive) + 刂(knife); 时 = 日 (sun) + 寸 (inch)

Meaning

The phrase 到时候 is used to refer to a future point in time that has been mentioned or implied, meaning 'when the time comes' or 'by then.' It connects a current plan or condition to an anticipated future moment.

到时候 can appear at the beginning of the second clause to connect it to a prior statement about future plans, or independently to refer to a previously established future moment. It differs from 到那时 which is more formal and literary. Unlike 的时候 which marks 'when' in general temporal clauses, 到时候 specifically refers to an anticipated future moment. It often carries a slight warning or anticipatory tone, suggesting that when that time arrives, certain consequences or conditions will follow. In informal speech, it is sometimes shortened to 到时.

Examples

1. 你先把材料准备好，到时候就不会手忙脚乱了。 Get the materials ready first, and when the time comes you won't be in a panic.
2. 我们暑假打算去云南旅行，到时候再具体安排行程。 We plan to travel to Yunnan this summer — we'll arrange the specifics when the time comes.
3. 合同下个月才到期，到时候我们再谈续签的事。 The contract doesn't expire until next month; we'll discuss renewal when the time comes.

Usage Guide

Context: spoken, written, everyday

Tone: anticipatory

Do Say

• 你现在多复习一下，到时候考试就不紧张了。
• 到时候你来了就知道了，不用我提前解释。
• 我们先定好酒店，到时候到了直接入住。

Don't Say

• 到时候我昨天去了图书馆。(到时候 refers to a future point in time, not the past — use 那时候 or 当时 for past events) → 那时候我去了图书馆。
• 到时候他每天都在运动。(到时候 cannot describe habitual actions — it refers to a specific anticipated future moment, not routines) → 他每天都在运动。

Origin & History

到时候 literally means 'arrive at the time' — 到 (arrive) + 时候 (time/moment). It has been used since classical Chinese to mark anticipated future moments, and in modern Mandarin it functions as a versatile temporal phrase for referencing future points in discourse.

Cultural Context

Generation: All ages

Social background: Universal