Time difference between Chicago and San Mateo Atenco
San Mateo Atenco is 1 hours behind Chicago.
Local time in both cities
Chicago · United States
13:03
United StatesSan Mateo Atenco · Mexico
12:03
MexicoSan Mateo Atenco is 1 hours behind Chicago.
same day
Time zones
| Chicago | America/Chicago · UTC-05:00 |
|---|---|
| San Mateo Atenco | America/Mexico_City · UTC-06:00 |
Chicago is currently on daylight saving time (UTC-05:00). Next change: 2026-11-01 01:00.
San Mateo Atenco does not observe daylight saving and stays on UTC-06:00 all year.
Hour-by-hour conversion
Calculated for 2026-09-21 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) | San Mateo Atenco (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 San Mateo Atenco 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 San Mateo Atenco uses America/Mexico_City; 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 San Mateo Atenco 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.