跨时区协作真正的摩擦不是「现在几点」，而是「这个时间点会不会把谁推到深夜」。 zonesoul 把若干个时区压成一条 24 小时热力条：绿色是全员都在工作时段，黄色是有人已经下班或还没上班， 暗红是有人正在睡觉。先看下面的常用时差估个大概，再用上面的工具把具体城市拉进来。
| 城市 | 时区 | 与北京时差 | 说明 |
|---|---|---|---|
| 纽约 | UTC−5 | −13 小时 | 夏令时期间 −12 |
| 洛杉矶 | UTC−8 | −16 小时 | 夏令时期间 −15 |
| 多伦多 | UTC−5 | −13 小时 | 夏令时期间 −12 |
| 伦敦 | UTC+0 | −8 小时 | 夏令时期间 −7 |
| 巴黎 / 柏林 | UTC+1 | −7 小时 | 夏令时期间 −6 |
| 莫斯科 | UTC+3 | −5 小时 | 全年不变 |
| 迪拜 | UTC+4 | −4 小时 | 全年不变 |
| 新德里 | UTC+5:30 | −2 小时 30 分 | 半小时时区 |
| 新加坡 / 香港 | UTC+8 | 0 | 与北京同时 |
| 东京 | UTC+9 | +1 小时 | 全年不变 |
| 悉尼 | UTC+11 | +3 小时 | 夏令时；标准时间 +2 |
| 奥克兰 | UTC+13 | +5 小时 | 夏令时；标准时间 +4 |
数值按 11 月（北半球标准时间）计算；夏令时切换后会自动变化，页面里的实时数字永远以当地规则为准。
打开页面，最上面是你所在时区，其余城市卡片每秒走动。也可以在搜索框里输入城市名或时区，例如「纽约」「Tokyo」「+9」，最多同时对比 10 个时区。
时差 = 两地相对 UTC 的偏移相减，页面按分钟显示。印度是 UTC+5:30、尼泊尔是 UTC+5:45，这类非整点时区不四舍五入；跨国际日期变更线时会提示对方是「早一天」还是「晚一天」。
夏令时。纽约夏令时（EDT，UTC-4）期间与北京差 12 小时，11 月初改回标准时间（EST，UTC-5）后差 13 小时。本站不写死偏移量，每次都用浏览器内置的 IANA 时区数据现算。
以 11 月为例：悉尼（UTC+11，夏令时）比北京快 3 小时，非夏令时快 2 小时；哈萨克斯坦（UTC+5）比北京慢 3 小时；新西兰（UTC+13，夏令时）快 5 小时。
点开「时段」，设好上班、下班、睡觉、起床四个时刻。热力条用绿黄红三色标出：全员在上班、有人不在工作时段、有人已经睡了；下面的「时间公平」一行会给出最早的可用开始时间和最晚的结束时间。
The friction in cross-timezone work is not "what time is it there" but "will this hour push someone into the night". zonesoul compresses several timezones into one 24-hour heat bar: green means everyone is inside working hours, amber means someone is already off or not yet started, dark red means someone is asleep. Glance at the table below for a rough offset, then pull your own cities into the tool above.
| City | Zone | vs Beijing | Note |
|---|---|---|---|
| New York | UTC−5 | −13 h | −12 h during DST |
| Los Angeles | UTC−8 | −16 h | −15 h during DST |
| Toronto | UTC−5 | −13 h | −12 h during DST |
| London | UTC+0 | −8 h | −7 h during DST |
| Paris / Berlin | UTC+1 | −7 h | −6 h during DST |
| Moscow | UTC+3 | −5 h | no DST |
| Dubai | UTC+4 | −4 h | no DST |
| New Delhi | UTC+5:30 | −2 h 30 m | half-hour zone |
| Singapore / Hong Kong | UTC+8 | 0 | same as Beijing |
| Tokyo | UTC+9 | +1 h | no DST |
| Sydney | UTC+11 | +3 h | DST; +2 h in standard time |
| Auckland | UTC+13 | +5 h | DST; +4 h in standard time |
Values are for November (northern-hemisphere standard time). DST switches move them — the live numbers on this page always follow each city's own rules.
Open the page: your own timezone sits on top and every other city card ticks each second. Or type a city or an offset into the search box — "New York", "Tokyo", "+9" — and compare up to 10 timezones at once.
Difference = the two UTC offsets subtracted, shown to the minute. Half-hour and 45-minute zones (India UTC+5:30, Nepal UTC+5:45) are never rounded, and crossing the date line flags whether the other side is a day ahead or behind.
Daylight saving. New York is UTC−4 in summer (12 h behind Beijing) and UTC−5 after the November switch (13 h). Nothing is hard-coded — offsets are read from the browser's IANA timezone data every time.
In November: Sydney is UTC+11 (DST), 3 hours ahead of Beijing, and 2 hours ahead without DST. Kazakhstan is UTC+5, 3 hours behind. New Zealand is UTC+13 (DST), 5 hours ahead.
Open "Hours" and set work start/end plus sleep/wake. The bar colours every hour green (everyone at work), amber (someone off-hours) or dark red (someone asleep); the fairness line below gives the earliest start and latest end that actually work.
Cross-timezone meeting planner · When daylight saving shifts the difference · About