Time Difference Between Hong Kong and Tokyo
Tokyo is 1h ahead of Hong Kong all year. Neither city observes daylight saving time, so this difference stays constant.
Hong Kong keeps the same clock all year. Tokyo keeps the same clock all year. The figure above holds for the whole year. It does not come from the offset on the day the site was built. The live clocks use the current time.
Working Hours Overlap
For each hour of Hong Kong's working day (9:00-18:00), here is the corresponding local time in Tokyo. Rows highlighted green fall within standard working hours (9:00-18:00) in both cities. Each block is one part of the year, so the table does not change with the day this page was built.
| Hong Kong | Tokyo | Both working hours? |
|---|---|---|
| 9 AM | 10 AM | Yes |
| 10 AM | 11 AM | Yes |
| 11 AM | 12 PM | Yes |
| 12 PM | 1 PM | Yes |
| 1 PM | 2 PM | Yes |
| 2 PM | 3 PM | Yes |
| 3 PM | 4 PM | Yes |
| 4 PM | 5 PM | Yes |
| 5 PM | 6 PM | No |
| 6 PM | 7 PM | No |
Best Time to Meet
- 9 AM-5 PM in Hong Kong (10 AM-6 PM in Tokyo) works for both sides. It falls within 9 AM-6 PM in both time zones.
How the Difference Changes
The difference between Hong Kong and Tokyo holds all year. Neither city changes its clocks.
Working Across Hong Kong and Tokyo
Tokyo is one hour ahead of Hong Kong, and neither clock ever moves for daylight saving. 9 AM in Hong Kong is 10 AM in Tokyo. 6 PM in Tokyo is 5 PM in Hong Kong. The whole ordinary day overlaps, which is rare on a four-hour flight and easy to waste by scheduling as if the gap were larger. There is no seasonal audit. A recurring invite stays where you put it. An hour is the entire difference, and it does not grow in summer.
Hong Kong finance already staffs odd hours for London, and that habit should not leak onto Tokyo. A desk that stays until 8 PM in Hong Kong to catch a London morning is at 9 PM in Tokyo, which is not a Tokyo working hour. Keep the Tokyo relationship inside the shared day, and let the London overlap be a separate commitment with its own people. The other collision is the calendar. Japan's mid-August break and Hong Kong's typhoon season are the same months. A week that looks empty on a Tokyo calendar can still be the week signal No. 8 closes Hong Kong.
The nonstop is about four and a half hours. One hour of difference will not wreck anyone. What wrecks the arrival morning is a late departure and a short night, not the zone. You can take a morning meeting the day you land if you slept, and you should not pretend the timezone is the reason you are tired if you did not. A 2 AM departure explains a bad morning. This page's one hour does not. Plan the arrival around the departure, not the offset.
Guides for this corridor
- Same clock, different calendar
New York and Toronto, Seoul and Tokyo, Hong Kong and Singapore, Beijing and Singapore. The offset is zero or close to it. The meetings fail on holidays, typhoons, and a week of lunar new year that only one side takes.
Hong Kong
Hong Kong uses the Asia/Hong_Kong time zone, at UTC+8 all year. This zone does not observe daylight saving time.
Tokyo
Tokyo uses the Asia/Tokyo time zone, at UTC+9 all year. This zone does not observe daylight saving time.