Time difference between Chicago and Rock Springs
Rock Springs is 1 hours behind Chicago.
Local time in both cities
Chicago · United States
23:34
Rock Springs · United States
22:34
Rock Springs is 1 hours behind Chicago.
same day
Time zones
| Chicago | America/Chicago · UTC-05:00 |
|---|---|
| Rock Springs | America/Denver · UTC-06:00 |
Chicago is currently on daylight saving time (UTC-05:00). Next change: 2026-11-01 01:00.
Rock Springs is currently on daylight saving time (UTC-06:00). Next change: 2026-11-01 01:00.
Hour-by-hour conversion
Calculated for 2026-09-20 local time in Chicago. The two places start and end daylight saving on different dates, so another day can give a different result.
| Chicago (source) | Rock Springs (target) |
|---|---|
| 00:00 | 23:00 prev day |
| 01:00 | 00:00 |
| 02:00 | 01:00 |
| 03:00 | 02:00 |
| 04:00 | 03:00 |
| 05:00 | 04:00 |
| 06:00 | 05:00 |
| 07:00 | 06:00 |
| 08:00 | 07:00 |
| 09:00 | 08:00 |
| 10:00 | 09:00 |
| 11:00 | 10:00 |
| 12:00 | 11:00 |
| 13:00 | 12:00 |
| 14:00 | 13:00 |
| 15:00 | 14:00 |
| 16:00 | 15:00 |
| 17:00 | 16:00 |
| 18:00 | 17:00 |
| 19:00 | 18:00 |
| 20:00 | 19:00 |
| 21:00 | 20:00 |
| 22:00 | 21:00 |
| 23:00 | 22:00 |
Other common differences from Chicago
FAQ
- How many hours apart are Chicago and Rock Springs right now?
- The answer at the top of the page is calculated for the current moment and states which side is ahead. The gap changes during the year, because the two places usually start and end daylight saving on different dates.
- Is this difference the same all year?
- Not necessarily. Chicago uses America/Chicago and Rock Springs uses America/Denver; if either observes daylight saving, the gap shifts during the year. Use “Convert a specific date and time” below to calculate it for a given day.
- How do I read the conversion table?
- The left column lists each whole hour in Chicago; the right column is the local time in Rock Springs at that same instant, with date rollovers marked. On the day clocks jump forward, some hours do not exist locally — the table says so instead of showing a plausible but wrong value.