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