Time zone
UTC−3
20 atlas cities
All these cities share a single clock time, yet the sun's peak falls on either side of noon depending on position within the zone. Brazil's eastern coastal cities—Rio de Janeiro, Salvador, Fortaleza, Recife, Maceió, Belo Horizonte—see the sun peak before clock noon, while São Paulo, Santiago, Buenos Aires, Brasília, and other interior or western cities peak afterward, showing how one civil time stretches across a wide longitudinal spread.
Atlas cities20
Longitude span-70.7° to -34.9°
Solar meridian-45.0°where this offset would be exact
When the sun actually peaks
| City | Country | Solar noon | Clock vs sun |
|---|---|---|---|
| Santiago | CL | 13:43 | +1.71 h |
| Córdoba | AR | 13:17 | +1.28 h |
| Buenos Aires | AR | 12:54 | +0.89 h |
| Asunción | PY | 12:51 | +0.84 h |
| Montevideo | UY | 12:45 | +0.75 h |
| Paramaribo | SR | 12:41 | +0.68 h |
| Porto Alegre | BR | 12:25 | +0.42 h |
| Curitiba | BR | 12:17 | +0.28 h |
| Goiânia | BR | 12:17 | +0.28 h |
| Belém | BR | 12:14 | +0.23 h |
| Brasília | BR | 12:12 | +0.20 h |
| Campinas | BR | 12:08 | +0.14 h |
| São Paulo | BR | 12:07 | +0.11 h |
| Guarulhos | BR | 12:06 | +0.10 h |
| Belo Horizonte | BR | 11:56 | -0.07 h |
| Rio de Janeiro | BR | 11:53 | -0.12 h |
| Fortaleza | BR | 11:34 | -0.43 h |
| Salvador | BR | 11:34 | -0.43 h |
| Maceió | BR | 11:23 | -0.62 h |
| Recife | BR | 11:20 | -0.67 h |
A positive figure means the clock runs ahead of the sun — midday on the clock arrives before the sun reaches its highest point.