Session overlap · Japan Standard Time
SSE & HKEX overlap hoursin Tokyo time
Both exchanges are open at the same time between 10:30 and 16:00 Tokyo time, a 5h 30m shared window. SSE trades 18:30–00:00 and HKEX trades 18:30–01:00 in Tokyo time. Both run Monday to Friday, so the overlap occurs on weekdays only.
- 10:30
- Overlap starts (Tokyo)
- 16:00
- Overlap ends (Tokyo)
- 5h 30m
- Shared trading time
Overlap window in Tokyo
10:30–16:00
Japan Standard TimeTimes assume the exchanges’ regular sessions and are converted from exchange local time to Japan Standard Time; holidays and early closes can remove the overlap on a given day.
| Market | Open (Japan Standard Time) | Close (Japan Standard Time) |
|---|---|---|
| SSE | 18:30 | 00:00 |
| HKEX | 18:30 | 01:00 |
How the SSE–HKEX overlap is calculated
The overlap is the intersection of each exchange’s regular trading session after converting both to Japan Standard Time. In this timezone, SSE runs 18:30–00:00 and HKEX runs 18:30–01:00, so both are open together from 10:30 to 16:00 — 5h 30m of shared trading time.
Weekends are excluded, and any full-day holiday or early close on either side shrinks the window for that date. Use the two holiday calendars below before planning a session that relies on the overlap, and check the live open/closed status if you need the current figure rather than the scheduled one.