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