Observatory log
Hong Kong and Flagstaff, compared
- 01Difference now
Flagstaff is 15 hours behind Hong Kong.
Hong Kong: HKT (UTC+8) · Flagstaff: MST (UTC−7)
- 02Through 2026–2027
The difference stays the same all year.
- 1 January 2026 – 31 December 2027−15 h
Difference of Flagstaff from Hong Kong. It changes on the days either place changes its clocks (dates local to that place).
- 03Shared working hours
Their working days never overlap.
Counted as 09:00–17:00 local time on each place’s own working days, for the next seven days.
- 04Best time to meet
09:00–13:00 in Hong Kong = 18:00–22:00 in Flagstaff
No shared office hours: this is early or late for one side (Tue–Fri).
Also possible: Tue–Fri: 06:00–08:00 in Hong Kong = 15:00–17:00 in Flagstaff (yesterday) · 2 h.
- 05Weekend
Hong Kong: Saturday and Sunday
Flagstaff: Saturday and Sunday
24 hours
A day in Hong Kong, in Flagstaff
| Hong Kong | Flagstaff | Working hours, evening, night or weekend in each place |
|---|---|---|
| 00:00 | 09:00Yesterday | |
| 01:00 | 10:00Yesterday | |
| 02:00 | 11:00Yesterday | |
| 03:00 | 12:00Yesterday | |
| 04:00 | 13:00Yesterday | |
| 05:00 | 14:00Yesterday | |
| 06:00 | 15:00Yesterday | |
| 07:00 | 16:00Yesterday | |
| 08:00 | 17:00Yesterday | |
| 09:00 | 18:00Yesterday | |
| 10:00 | 19:00Yesterday | |
| 11:00 | 20:00Yesterday | |
| 12:00 | 21:00Yesterday | |
| 13:00 | 22:00Yesterday | |
| 14:00 | 23:00Yesterday | |
| 15:00 | 00:00 | |
| 16:00 | 01:00 | |
| 17:00 | 02:00 | |
| 18:00 | 03:00 | |
| 19:00 | 04:00 | |
| 20:00 | 05:00 | |
| 21:00 | 06:00 | |
| 22:00 | 07:00 | |
| 23:00 | 08:00 |
Working hoursEarly or eveningNightWeekend
Questions
Asked about Hong Kong and Flagstaff
What is the time difference between Hong Kong and Flagstaff?
Flagstaff is 15 hours behind Hong Kong. The difference stays the same all year.
What is the best time for a call between Hong Kong and Flagstaff?
No shared office hours. The least awkward windows, early or late for one side: Tue–Fri: 09:00–13:00 in Hong Kong = 18:00–22:00 in Flagstaff (yesterday) · 4 h; Tue–Fri: 06:00–08:00 in Hong Kong = 15:00–17:00 in Flagstaff (yesterday) · 2 h.
When does the time difference between Hong Kong and Flagstaff change?
It does not change in the next 12 months: Hong Kong and Flagstaff either keep the same time all year or change their clocks on the same dates.