Observatory log
Osaka and Chicago, compared
- 01Difference now
Chicago is 14 hours behind Osaka.
Osaka: JST (UTC+9) · Chicago: CDT (UTC−5)
Next changeFrom 1 November 2026: Chicago is 15 hours behind Osaka.
- 02Through 2026–2027
- 1 January 2026 – 8 March 2026−15 h
- 8 March 2026 – 1 November 2026−14 h
- 1 November 2026 – 14 March 2027−15 h
- 14 March 2027 – 7 November 2027−14 h
- 7 November 2027 – 31 December 2027−15 h
Difference of Chicago from Osaka. 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
09:00–12:00 in Osaka = 19:00–22:00 in Chicago
No shared office hours: this is early or late for one side (Tue–Fri).
Also possible: Tue–Fri: 06:00–07:00 in Osaka = 16:00–17:00 in Chicago (yesterday) · 1 h.
- 05Weekend
Osaka: Saturday and Sunday
Chicago: Saturday and Sunday
24 hours
A day in Osaka, in Chicago
| Osaka | Chicago | Working hours, evening, night or weekend in each place |
|---|---|---|
| 00:00 | 10:00Yesterday | |
| 01:00 | 11:00Yesterday | |
| 02:00 | 12:00Yesterday | |
| 03:00 | 13:00Yesterday | |
| 04:00 | 14:00Yesterday | |
| 05:00 | 15:00Yesterday | |
| 06:00 | 16:00Yesterday | |
| 07:00 | 17:00Yesterday | |
| 08:00 | 18:00Yesterday | |
| 09:00 | 19:00Yesterday | |
| 10:00 | 20:00Yesterday | |
| 11:00 | 21:00Yesterday | |
| 12:00 | 22:00Yesterday | |
| 13:00 | 23:00Yesterday | |
| 14:00 | 00:00 | |
| 15:00 | 01:00 | |
| 16:00 | 02:00 | |
| 17:00 | 03:00 | |
| 18:00 | 04:00 | |
| 19:00 | 05:00 | |
| 20:00 | 06:00 | |
| 21:00 | 07:00 | |
| 22:00 | 08:00 | |
| 23:00 | 09:00 |
Working hoursEarly or eveningNightWeekend
Plan a meeting: Osaka and Chicago
More time differences with Chicago
Questions
Asked about Osaka and Chicago
What is the time difference between Osaka and Chicago?
Chicago is 14 hours behind Osaka. This holds until 1 November 2026; then Chicago is 15 hours behind Osaka.
What is the best time for a call between Osaka and Chicago?
No shared office hours. The least awkward windows, early or late for one side: Tue–Fri: 09:00–12:00 in Osaka = 19:00–22:00 in Chicago (yesterday) · 3 h; Tue–Fri: 06:00–07:00 in Osaka = 16:00–17:00 in Chicago (yesterday) · 1 h.
When does the time difference between Osaka and Chicago change?
In the next 12 months it changes on: 1 November 2026 (−15 h); 14 March 2027 (−14 h).