Observatory log
Chicago and Bien Hoa, compared
- 01Difference now
Bien Hoa is 12 hours ahead of Chicago.
Chicago: CDT (UTC−5) · Bien Hoa: UTC+7 (UTC+7)
Next changeFrom 1 November 2026: Bien Hoa 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 Bien Hoa 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 Bien Hoa
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 Bien Hoa (tomorrow) · 1 h.
- 05Weekend
Chicago: Saturday and Sunday
Bien Hoa: Saturday and Sunday
24 hours
A day in Chicago, in Bien Hoa
| Chicago | Bien Hoa | 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 Bien Hoa
More time differences with Chicago
Questions
Asked about Chicago and Bien Hoa
What is the time difference between Chicago and Bien Hoa?
Bien Hoa is 12 hours ahead of Chicago. This holds until 1 November 2026; then Bien Hoa is 13 hours ahead of Chicago.
What is the best time for a call between Chicago and Bien Hoa?
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 Bien Hoa · 1 h; Mon–Thu: 21:00–22:00 in Chicago = 09:00–10:00 in Bien Hoa (tomorrow) · 1 h.
When does the time difference between Chicago and Bien Hoa change?
In the next 12 months it changes on: 1 November 2026 (+13 h); 14 March 2027 (+12 h).