[{"data":1,"prerenderedAt":164},["ShallowReactive",2],{"page:\u002Fzh\u002Fguides\u002Ftime-zones-and-dst":3},{"id":4,"title":5,"body":6,"description":145,"extension":146,"faq":147,"intro":154,"kind":155,"locale":156,"meta":157,"navigation":158,"path":159,"seo":160,"seoTitle":161,"stem":162,"__hash__":163},"pages\u002Fzh\u002Fguides\u002Ftime-zones-and-dst.md","理解时区与夏令时",{"type":7,"value":8,"toc":136},"minimark",[9,14,26,35,38,82,85,88,91,94,97,104,107,110],[10,11,13],"h2",{"id":12},"时区是一组规则不是固定数字","时区是一组规则，不是固定数字",[15,16,17,21,22,25],"p",{},[18,19,20],"code",{},"America\u002FNew_York"," 和 ",[18,23,24],{},"Europe\u002FLondon"," 是 IANA 地区标识。UTC−05:00 或 UTC+01:00 只表示某一时刻的偏移。时区缩写在全球并不唯一，交流地区时间时应保留 IANA 名称。",[15,27,28,29,34],{},"纽约标准时间为 UTC−05:00，夏令时为 UTC−04:00；伦敦则在 UTC+00:00 与 UTC+01:00 之间切换。双方不总在同一周调钟。2026 年 3 月 10 日纽约中午对应伦敦 16:00，而 3 月 31 日中午对应 17:00，可在",[30,31,33],"a",{"href":32},"\u002Fzh\u002Ftime-converter\u002F","转换器","核对实际日期。",[10,36,37],{"id":37},"有些当地钟点会跳过或重复",[39,40,41,54],"table",{},[42,43,44],"thead",{},[45,46,47,51],"tr",{},[48,49,50],"th",{},"纽约输入",[48,52,53],{},"含义",[55,56,57,66,74],"tbody",{},[45,58,59,63],{},[60,61,62],"td",{},"2024-03-10 02:30",[60,64,65],{},"春季向前跳时，不存在",[45,67,68,71],{},[60,69,70],{},"2024-11-03 01:30，UTC−04:00",[60,72,73],{},"较早一次，对应 05:30 UTC",[45,75,76,79],{},[60,77,78],{},"2024-11-03 01:30，UTC−05:00",[60,80,81],{},"较晚一次，对应 06:30 UTC",[15,83,84],{},"因此，一组当地日期与钟点不一定只对应一个绝对时刻。不存在时应拒绝，重复时应确认偏移。一个自然日也可能有 23 或 25 小时，会议时间轴不能始终假设每天都恰好 24 小时。",[10,86,87],{"id":87},"非整小时偏移与跨年",[15,89,90],{},"加德满都使用 UTC+05:45。阿德莱德标准时间为 UTC+09:30，夏令时为 UTC+10:30。这些分钟差不能四舍五入为整小时。",[15,92,93],{},"加德满都 2026 年 12 月 31 日 23:30，对应阿德莱德 2027 年 1 月 1 日 04:15。绝对时刻相同，但目标已跨年。因此告知会议时间时，要同时写日期和钟点。",[10,95,96],{"id":96},"用完整时长安排会议",[15,98,99,103],{},[30,100,102],{"href":101},"\u002Fzh\u002Fmeeting-planner\u002F","会议排期","把各地工作时段转为绝对区间，再核对整个会议。开始时间合适不代表结束也合适，周末和跨午夜也会影响结果。工作时段适配并不是实际空闲情况。",[15,105,106],{},"未来的重复活动应保留来源地区时区和希望采用的当地钟点。政策可能改变，浏览器时区数据也可能滞后。本网站使用现有浏览器规则与设备时钟，不提供法定标准时间保证。",[10,108,109],{"id":109},"技术参考",[111,112,113,122,129],"ul",{},[114,115,116],"li",{},[30,117,121],{"href":118,"rel":119},"https:\u002F\u002Fwww.iana.org\u002Ftime-zones",[120],"nofollow","IANA 时区数据库",[114,123,124],{},[30,125,128],{"href":126,"rel":127},"https:\u002F\u002Fdeveloper.mozilla.org\u002Fen-US\u002Fdocs\u002FWeb\u002FJavaScript\u002FReference\u002FGlobal_Objects\u002FTemporal\u002FZonedDateTime",[120],"MDN：Temporal.ZonedDateTime",[114,130,131],{},[30,132,135],{"href":133,"rel":134},"https:\u002F\u002Fwww.rfc-editor.org\u002Frfc\u002Frfc5545",[120],"RFC 5545 日历事件规范",{"title":137,"searchDepth":138,"depth":138,"links":139},"",2,[140,141,142,143,144],{"id":12,"depth":138,"text":13},{"id":37,"depth":138,"text":37},{"id":87,"depth":138,"text":87},{"id":96,"depth":138,"text":96},{"id":109,"depth":138,"text":109},"理解 IANA 时区、UTC 偏移、跳过或重复的当地时间，以及它们对城市时钟和跨国会议的影响。","md",[148,151],{"question":149,"answer":150},"UTC 偏移就是时区吗？","不是。偏移表示某一时刻的差值，IANA 时区则包含会随日期变化的地区规则。",{"question":152,"answer":153},"为什么纽约与伦敦有时差四小时、有时五小时？","美国与欧洲的切换日期不同，中间的几周会改变常见时差。",null,"guide","zh",{},true,"\u002Fzh\u002Fguides\u002Ftime-zones-and-dst",{"title":5,"description":145},"时区与夏令时指南 — UTC 偏移、重复时间与会议安排","zh\u002Fguides\u002Ftime-zones-and-dst","gJC13R3l5ws1g6L-4iwiV-WOfjv51JYvE4vy2RU_DmY",1792030945475]