Observatory log
Chicago and Cat Lake, compared
- 01Difference now
Chicago and Cat Lake have the same time.
Chicago: CDT (UTC−5) · Cat Lake: CDT (UTC−5)
Next changeFrom 1 November 2026: Cat Lake is 1 hour ahead of Chicago.
- 02Through 2026–2027
- 1 January 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 Cat Lake 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 Cat Lake · 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 Cat Lake
Inside both working days (Mon–Fri).
- 05Weekend
Chicago: Saturday and Sunday
Cat Lake: Saturday and Sunday
24 hours
A day in Chicago, in Cat Lake
| Chicago | Cat Lake | 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 Cat Lake
More time differences with Chicago
Questions
Asked about Chicago and Cat Lake
What is the time difference between Chicago and Cat Lake?
Chicago and Cat Lake have the same time. This holds until 1 November 2026; then Cat Lake is 1 hour ahead of Chicago.
What is the best time for a call between Chicago and Cat Lake?
Inside both working days: Mon–Fri: 09:00–17:00 in Chicago = 09:00–17:00 in Cat Lake · 8 h.
When does the time difference between Chicago and Cat Lake change?
In the next 12 months it changes on: 1 November 2026 (+1 h); 14 March 2027 (Same time).