In January the difference is +19 hours, in July +17 hours. It changes because the two places do not switch to daylight saving time on the same dates. During the transition weeks in between it is +18 hours. When it is 12:00 PM (noon) in Chicago, it is 7:00 AM (next day) in Auckland in January and 5:00 AM (next day) in July.
Changes during 2026
- Sunday, 8 March 2026: +18 hours
- Sunday, 5 April 2026: +17 hours
- Sunday, 27 September 2026: +18 hours
- Sunday, 1 November 2026: +19 hours
Conversion table
| Chicago | Auckland |
|---|
Green: between 8 AM and 8 PM in both places – ideal for calls and meetings.