计算工具
时区转换器
免费时区转换器。在带有时区处理的IANA时区之间转换任何日期和时间。非常适合安排跨区域会议。
Runs in your browser
编辑注
Understanding · Same instant, different clocks.
本深度章节目前仅有英文版本。上方的转换工具支持您的语言;长篇说明文章尚未翻译。
常见问题
Quick answers.
›Which timezones are supported?
All IANA zones — over 400 of them, including legacy aliases. Same data set used by every modern operating system.
›Does it handle daylight saving?
Yes. We use your browser's IANA timezone database, which knows DST start/end dates for every zone past and future.
›What's the difference between EST and EDT?
EST is Eastern Standard Time (UTC-5, winter). EDT is Eastern Daylight Time (UTC-4, summer). Use 'America/New_York' to get the right one automatically.
›Why does my conversion differ from another tool by 1 hour?
Almost always a DST mismatch. Check that both tools use the same date — the offset can change overnight when DST starts or ends.
›Is the timezone converter free?
Yes — free, no signup, no ads, runs in your browser.
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