Observatory log
Chicago and Ulan Ude, compared
- 01Difference now
Ulan Ude is 13 hours ahead of Chicago.
Chicago: CDT (UTC−5) · Ulan Ude: UTC+8 (UTC+8)
Next changeFrom 1 November 2026: Ulan Ude is 14 hours ahead of Chicago.
- 02Through 2026–2027
- 1 January 2026 – 8 March 2026+14 h
- 8 March 2026 – 1 November 2026+13 h
- 1 November 2026 – 14 March 2027+14 h
- 14 March 2027 – 7 November 2027+13 h
- 7 November 2027 – 31 December 2027+14 h
Difference of Ulan Ude 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
20:00–22:00 in Chicago = 09:00–11:00 in Ulan Ude
No shared office hours: this is early or late for one side (Mon–Thu).
- 05Weekend
Chicago: Saturday and Sunday
Ulan Ude: Saturday and Sunday
24 hours
A day in Chicago, in Ulan Ude
| Chicago | Ulan Ude | Working hours, evening, night or weekend in each place |
|---|---|---|
| 00:00 | 13:00 | |
| 01:00 | 14:00 | |
| 02:00 | 15:00 | |
| 03:00 | 16:00 | |
| 04:00 | 17:00 | |
| 05:00 | 18:00 | |
| 06:00 | 19:00 | |
| 07:00 | 20:00 | |
| 08:00 | 21:00 | |
| 09:00 | 22:00 | |
| 10:00 | 23:00 | |
| 11:00 | 00:00Tomorrow | |
| 12:00 | 01:00Tomorrow | |
| 13:00 | 02:00Tomorrow | |
| 14:00 | 03:00Tomorrow | |
| 15:00 | 04:00Tomorrow | |
| 16:00 | 05:00Tomorrow | |
| 17:00 | 06:00Tomorrow | |
| 18:00 | 07:00Tomorrow | |
| 19:00 | 08:00Tomorrow | |
| 20:00 | 09:00Tomorrow | |
| 21:00 | 10:00Tomorrow | |
| 22:00 | 11:00Tomorrow | |
| 23:00 | 12:00Tomorrow |
Working hoursEarly or eveningNightWeekend
Plan a meeting: Chicago and Ulan Ude
More time differences with Chicago
Questions
Asked about Chicago and Ulan Ude
What is the time difference between Chicago and Ulan Ude?
Ulan Ude is 13 hours ahead of Chicago. This holds until 1 November 2026; then Ulan Ude is 14 hours ahead of Chicago.
What is the best time for a call between Chicago and Ulan Ude?
No shared office hours. The least awkward windows, early or late for one side: Mon–Thu: 20:00–22:00 in Chicago = 09:00–11:00 in Ulan Ude (tomorrow) · 2 h.
When does the time difference between Chicago and Ulan Ude change?
In the next 12 months it changes on: 1 November 2026 (+14 h); 14 March 2027 (+13 h).