Observatory log
Chicago and Hai Duong, compared
- 01Difference now
Hai Duong is 12 hours ahead of Chicago.
Chicago: CDT (UTC−5) · Hai Duong: UTC+7 (UTC+7)
Next changeFrom 1 November 2026: Hai Duong is 13 hours ahead of Chicago.
- 02Through 2026–2027
- 1 January 2026 – 8 March 2026+13 h
- 8 March 2026 – 1 November 2026+12 h
- 1 November 2026 – 14 March 2027+13 h
- 14 March 2027 – 7 November 2027+12 h
- 7 November 2027 – 31 December 2027+13 h
Difference of Hai Duong from Chicago. 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
09:00–10:00 in Chicago = 21:00–22:00 in Hai Duong
No shared office hours: this is early or late for one side (Mon–Fri).
Also possible: Mon–Thu: 21:00–22:00 in Chicago = 09:00–10:00 in Hai Duong (tomorrow) · 1 h.
- 05Weekend
Chicago: Saturday and Sunday
Hai Duong: Saturday and Sunday
24 hours
A day in Chicago, in Hai Duong
| Chicago | Hai Duong | Working hours, evening, night or weekend in each place |
|---|---|---|
| 00:00 | 12:00 | |
| 01:00 | 13:00 | |
| 02:00 | 14:00 | |
| 03:00 | 15:00 | |
| 04:00 | 16:00 | |
| 05:00 | 17:00 | |
| 06:00 | 18:00 | |
| 07:00 | 19:00 | |
| 08:00 | 20:00 | |
| 09:00 | 21:00 | |
| 10:00 | 22:00 | |
| 11:00 | 23:00 | |
| 12:00 | 00:00Tomorrow | |
| 13:00 | 01:00Tomorrow | |
| 14:00 | 02:00Tomorrow | |
| 15:00 | 03:00Tomorrow | |
| 16:00 | 04:00Tomorrow | |
| 17:00 | 05:00Tomorrow | |
| 18:00 | 06:00Tomorrow | |
| 19:00 | 07:00Tomorrow | |
| 20:00 | 08:00Tomorrow | |
| 21:00 | 09:00Tomorrow | |
| 22:00 | 10:00Tomorrow | |
| 23:00 | 11:00Tomorrow |
Working hoursEarly or eveningNightWeekend
Plan a meeting: Chicago and Hai Duong
More time differences with Chicago
Questions
Asked about Chicago and Hai Duong
What is the time difference between Chicago and Hai Duong?
Hai Duong is 12 hours ahead of Chicago. This holds until 1 November 2026; then Hai Duong is 13 hours ahead of Chicago.
What is the best time for a call between Chicago and Hai Duong?
No shared office hours. The least awkward windows, early or late for one side: Mon–Fri: 09:00–10:00 in Chicago = 21:00–22:00 in Hai Duong · 1 h; Mon–Thu: 21:00–22:00 in Chicago = 09:00–10:00 in Hai Duong (tomorrow) · 1 h.
When does the time difference between Chicago and Hai Duong change?
In the next 12 months it changes on: 1 November 2026 (+13 h); 14 March 2027 (+12 h).