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