为什么用这个工具
03时区转换在浏览器本地运行，适合快速处理与复制结果。
时区转换适用于日常高频小任务，打开即用。
默认本地处理，便于快速检查与复制结果。
如何使用
02复制前快速检查
03先确认输入格式符合你的预期。
在把结果用于文档、链接、配置或消息前快速扫一眼。
只复制你真正需要的输出。
使用场景
Pick the meeting time in your local zone, convert to the other party's zone, and confirm there's no overlap with their out-of-hours. Faster than counting offsets in your head.
Server logs typically report UTC. Convert the moment of interest into your local time to align with what you were doing then, or into the customer's local time to understand their context.
Around DST shifts, the same wall-clock hour can map to two different UTC moments (or none). The converter shows the actual offset at the entered moment so you can confirm which side of the transition you're on.
Take an outbound departure (in your local zone) and a flight duration, calculate the UTC arrival, then convert to the destination zone for the local arrival time.
If two systems disagree on what timestamp <code>1747401000</code> represents, convert both displays into a common zone (UTC works best) and the discrepancy usually shows up as one system using seconds and the other milliseconds.
使用技巧
- 01Wall-clock input vs ISO-with-offset
Bare local strings (<code>2026-05-16T15:30</code>) are interpreted in the source zone. ISO strings with <code>Z</code> or <code>+HH:MM</code> are treated as absolute moments and the source-zone dropdown is irrelevant for them. Pick whichever input form matches what you actually have.
- 02DST creates non-existent and ambiguous local times
On a spring-forward day, 02:30 may not exist. On a fall-back day, 01:30 happens twice. The converter resolves these by picking the first valid moment — but be aware they exist and check the displayed UTC offset matches what you expected.
- 03Offsets aren't fixed per region
America/New_York is UTC-5 in winter and UTC-4 in summer. America/Phoenix is UTC-7 year-round (no DST). Asia/Shanghai is UTC+8 year-round. The exact offset is computed for the moment you entered, not a generic value.
- 04IANA zone names beat city/abbreviation names
EST means different things in different contexts (Eastern Standard Time has fixed UTC-5; Eastern Time follows DST). IANA names like America/New_York unambiguously include the DST rules — that's what this tool uses internally and what most modern code should use.
常见问题
01
这个工具会上传数据吗？
默认在浏览器本地处理。