Time zone
UTC−6
22 atlas cities
All these cities share a single clock time despite spanning a wide range of longitudes. Most Mexican and several US cities lie west of the zone's meridian, so the sun peaks after clock noon there, while Chicago and the Central American capitals of Mérida, Managua, Tegucigalpa, San Salvador, San José, and Belmopan sit east of it, seeing the sun peak before noon.
Atlas cities22
Longitude span-103.4° to -84.1°
Solar meridian-90.0°where this offset would be exact
When the sun actually peaks
| City | Country | Solar noon | Clock vs sun |
|---|---|---|---|
| Zapopan | MX | 12:54 | +0.89 h |
| Guadalajara | MX | 12:53 | +0.89 h |
| León de los Aldama | MX | 12:47 | +0.78 h |
| Santiago de Querétaro | MX | 12:42 | +0.69 h |
| Monterrey | MX | 12:41 | +0.69 h |
| Mexico City | MX | 12:37 | +0.61 h |
| Iztapalapa | MX | 12:36 | +0.60 h |
| Ecatepec de Morelos | MX | 12:36 | +0.60 h |
| Ciudad Nezahualcoyotl | MX | 12:36 | +0.60 h |
| San Antonio | US | 12:34 | +0.57 h |
| Puebla | MX | 12:33 | +0.55 h |
| Fort Worth | US | 12:29 | +0.49 h |
| Dallas | US | 12:27 | +0.45 h |
| Houston | US | 12:21 | +0.36 h |
| Guatemala City | GT | 12:02 | +0.03 h |
| Mérida | MX | 11:58 | -0.03 h |
| San Salvador | SV | 11:57 | -0.05 h |
| Belmopan | BZ | 11:55 | -0.08 h |
| Chicago | US | 11:51 | -0.16 h |
| Tegucigalpa | HN | 11:49 | -0.19 h |
| Managua | NI | 11:45 | -0.25 h |
| San José | CR | 11:36 | -0.39 h |
A positive figure means the clock runs ahead of the sun — midday on the clock arrives before the sun reaches its highest point.