All time is measured from Greenwich Mean Time (GMT.) Times are listed as GMT minus (-), hours as 0000. Some countries observe Daylight Savings Time (DST) in summer, except for Paraguay where is observed in winter to gain an extra hour of light.
Many countries or regions within the country observe the siesta. Business begins about 8 am, continues to noon, closes until 2 pm or later, and then reopens until 8 or 9 pm. Where this is the case, I've written siesta, and times of observance change locally.
Banks, government offices and many businesses are closed on Holidays and Festivals
| Country | Time | Electricity | Business Hours |
| Argentina | GMT-0300 | 220V, 50Hz | Buenos Aires - 8-5pm; provinces siesta Holidays and Festivals |
| Bolivia | GMT-0400 | La Paz and Potosi 110v, 50Hz; rest of Bolivia 220V, 50Hz. Check before using electrical appliances. Expect blackouts and keep a flashlight with you |
Siesta; restaurants 8-10 pm;
No business on Sunday Holidays and Festivals |
| Brazil | GMT-0300, plus 3 more times zones DST |
Rio and São Paulo - 110 or 120V 60Hz; Manaus and Salvador - 127V; Recife, Brasilia and other cities - 220V. Check before using electrical appliances. |
Government and shops 9-6pm M-F and 9-1pm on Saturdays; Shopping malls 9-10pm; provinces
vary Holidays and Festivals |
| Chile | GMT-0400; Easter Island - GMT-0600 DST |
220V | Santiago - 9-6pm; Banks and some government offices, morning only. Siesta elsewhere Holidays and Festivals |
| Colombia | GMT-0500 | 110V, 60Hz | Holidays and Festivals |
| Ecuador | GMT-0500 Galapagos- GMT-0600 |
110V, 60HZ | Holidays and Festivals |
| Falkland Islands | GMT-0400 DST in Stanley |
220V/440V, 50 Hz | Government offices 8-12, 1:15-4:30pm. Shops 8-7 or 8pm, less on weekends Holidays and Festivals |
| French Guiana | GMT-0300 | Siesta Holidays and Festivals |
|
| Guyana | GMT-0400 | Georgetown - 110V; elsewhere 220V Be prepared for blackouts |
Business closes by 3:30pm Holidays and Festivals |
| Paraguay | GMT-0300 DST in winter |
220V, 50 HZ | Banks 7:30-11am; Government offices 6:30-11am in summer; Shops siesta Holidays and Festivals |
| Peru | GMT-0500 | 220V, 60Hz Arequipa - 220V, 50Hz |
Siesta; 24 hour supermarkets in Lima. |
| Suriname | GMT-0300 | 127V | Government and business 7-2pm; Shops 8-4pm weekdays, 8-1pm Saturdays Holidays and Festivals |
| Uruguay | GMT-0300 | 220V, 50Hz | Siesta. Banks and government offices by season: mornings in summer, afternoons in winter Holidays and Festivals |
| Venezuela | GMT-0400 | 110V, 60Hz | 8-noon, 2-6pm; Shops 9-6 or 7pm. half day on Saturday
Holidays and Festivals |
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