Observatory log
Chicago and Oamaru, compared
- 01Difference now
Oamaru is 18 hours ahead of Chicago.
Chicago: CDT (UTC−5) · Oamaru: NZDT (UTC+13)
Next changeFrom 1 November 2026: Oamaru is 19 hours ahead of Chicago.
- 02Through 2026–2027
- 1 January 2026 – 8 March 2026+19 h
- 8 March 2026 – 5 April 2026+18 h
- 5 April 2026 – 27 September 2026+17 h
- 27 September 2026 – 1 November 2026+18 h
- 1 November 2026 – 14 March 2027+19 h
- 14 March 2027 – 4 April 2027+18 h
- 4 April 2027 – 26 September 2027+17 h
- 26 September 2027 – 7 November 2027+18 h
- 7 November 2027 – 31 December 2027+19 h
Difference of Oamaru from Chicago. It changes on the days either place changes its clocks (dates local to that place).
- 03Shared working hours
- Mon–Thu: 15:00–17:00 in Chicago = 09:00–11:00 in Oamaru (tomorrow) · 2 h
Counted as 09:00–17:00 local time on each place’s own working days, for the next seven days.
- 04Best time to meet
15:00–17:00 in Chicago = 09:00–11:00 in Oamaru
Inside both working days (Mon–Thu).
- 05Weekend
Chicago: Saturday and Sunday
Oamaru: Saturday and Sunday
24 hours
A day in Chicago, in Oamaru
| Chicago | Oamaru | Working hours, evening, night or weekend in each place |
|---|---|---|
| 00:00 | 18:00 | |
| 01:00 | 19:00 | |
| 02:00 | 20:00 | |
| 03:00 | 21:00 | |
| 04:00 | 22:00 | |
| 05:00 | 23:00 | |
| 06:00 | 00:00Tomorrow | |
| 07:00 | 01:00Tomorrow | |
| 08:00 | 02:00Tomorrow | |
| 09:00 | 03:00Tomorrow | |
| 10:00 | 04:00Tomorrow | |
| 11:00 | 05:00Tomorrow | |
| 12:00 | 06:00Tomorrow | |
| 13:00 | 07:00Tomorrow | |
| 14:00 | 08:00Tomorrow | |
| 15:00 | 09:00Tomorrow | |
| 16:00 | 10:00Tomorrow | |
| 17:00 | 11:00Tomorrow | |
| 18:00 | 12:00Tomorrow | |
| 19:00 | 13:00Tomorrow | |
| 20:00 | 14:00Tomorrow | |
| 21:00 | 15:00Tomorrow | |
| 22:00 | 16:00Tomorrow | |
| 23:00 | 17:00Tomorrow |
Working hoursEarly or eveningNightWeekend
Plan a meeting: Chicago and Oamaru
More time differences with Chicago
Questions
Asked about Chicago and Oamaru
What is the time difference between Chicago and Oamaru?
Oamaru is 18 hours ahead of Chicago. This holds until 1 November 2026; then Oamaru is 19 hours ahead of Chicago.
What is the best time for a call between Chicago and Oamaru?
Inside both working days: Mon–Thu: 15:00–17:00 in Chicago = 09:00–11:00 in Oamaru (tomorrow) · 2 h.
When does the time difference between Chicago and Oamaru change?
In the next 12 months it changes on: 1 November 2026 (+19 h); 14 March 2027 (+18 h); 4 April 2027 (+17 h); 26 September 2027 (+18 h).