How it works
- Each place's days come from the same official calendars as the rest of the site, including makeup workdays and, for Russia, days shortened by an hour.
- A day counts when every place is working on that local date. A makeup Saturday counts as a working day; a holiday or weekend anywhere does not.
- Shared hours compare everyone's local working hours on a day they all work, converted through each place's time zone on that date, so daylight saving time in the US and the UK is taken into account. Countries spanning several zones are split by city.
- The link in your address bar keeps your choices, so you can send the comparison to a colleague.
Example: China, London and New York in autumn 2026
Take a team in China, London and New York, each working 09:00–18:00 local time. In October 2026 all three are at work on 16 days: China is off for the National Day week, the US for Columbus Day, and weekends take the rest. The hours are harder than the days. With these working hours China and New York never overlap, so London is the bridge, and the bridge moves when the clocks change.
| Date | China ↔ London (China time) | London ↔ New York (London time) | All three |
|---|---|---|---|
| Thu, Oct 22 | 16:00–18:00 | 14:00–18:00 | none |
| Tue, Oct 27 | 17:00–18:00 | 13:00–18:00 | none |
| Thu, Nov 5 | 17:00–18:00 | 14:00–18:00 | none |
The UK leaves summer time on the last Sunday of October, the US on the first Sunday of November. In the week between, London–New York gains an hour and China–London loses one. China, Japan, Singapore, Vietnam and Russia don't change their clocks, so the shifts all come from the US and the UK.
Scheduling across time zones
- Find the shared hours before the shared days. If no hour suits everyone, meet in pairs with the place in the middle passing things on, or rotate the inconvenient slot.
- Mark the weeks when clocks change in only one place: up to three weeks in March, when the US moves before the UK, and one week around the turn of October and November.
- Collect each place's long breaks at the start of the year: mainland China's Spring Festival and National Day week, Vietnam's Tết, Russia's New Year holidays in early January, Japan's government offices closed from 29 December to 3 January, and Christmas in the UK and the US.
- When you send a link to the comparison, the dates and places travel with it, so everyone is looking at the same calendar.
Countries and regions covered
Each has its own page with the full calendar and sources:
What it doesn't know
- Years that are not published yet. Days from then on show as not published and are not counted.
- Company calendars. Many employers add days off, work on Saturdays or close for longer around a festival; ask your counterpart.
- Different working hours in each place. The tool applies the same local hours everywhere; change them to match the strictest office.
- State and regional holidays. The US list is federal only, and some Russian regions add their own days off.
Questions
- Why does a makeup Saturday count as a common working day?
- Because offices on that calendar are open that day. If the other places are working too — rare, since it is a Saturday — it is a day everyone works.
- Why do mainland China, Hong Kong and Taiwan show the same hours?
- All three use UTC+8, so their working hours line up exactly. Their days off still differ.
- Can I compare more than five places?
- Not yet. Five keeps the day-by-day view readable on a phone.
- Why does the United States only show federal holidays?
- Federal holidays are the one nationwide list the government publishes. States add their own days and private employers choose theirs, so check with your counterpart for anything beyond the federal list.