South America is one of the simplest continents in the world to schedule across, at least on paper. Nearly the entire continent sits within a narrow four hour band of UTC offsets, and the trend over the last decade has been for country after country to drop seasonal clock changes altogether. Chile is now the clear exception to that pattern, and understanding why is one of the more interesting stories in global timekeeping this year.
How many time zones does South America have
South America’s mainland spans four main standard offsets, from UTC−05:00 in the west to UTC−03:00 along most of the Atlantic coast [1]. Brazil alone adds a little more spread than that summary suggests, since its western states sit as far back as UTC−05:00 while the small island territory of Fernando de Noronha sits at UTC−02:00, even though the country does not use daylight saving time anywhere [1].
Because the continent lies almost entirely south of the equator, most of it experiences relatively small seasonal changes in daylight length compared with countries much further from the equator, which is part of why so many South American governments have concluded that seasonal clock changes are not worth the disruption.
The full list, zone by zone
UTC−02:00
- Fernando de Noronha, a small Brazilian island territory off the northeast coast, the easternmost point in Brazilian territory [1]
UTC−03:00, the most populous band on the continent
- Brazil, for the large majority of the country including Rio de Janeiro, São Paulo, and the capital Brasília [1, 3]
- Argentina [1]
- Uruguay [1]
- Paraguay, which moved to a permanent UTC−03:00 offset in October 2024, detailed further below [2]
- Suriname
- French Guiana, an overseas department of France
UTC−04:00
- Bolivia
- Venezuela
- Guyana
- Chile, during its winter standard time, along with most of the country’s Amazon-facing western Brazilian neighbors sitting on the same offset [7]
- Western Brazilian states, including Amazonas, Mato Grosso, Mato Grosso do Sul, Rondônia, and Roraima [1]
UTC−05:00
- Colombia [1]
- Ecuador, for the mainland [1]
- Peru [1]
- Acre state and the southwestern part of Amazonas state in Brazil, the country’s westernmost standard offset [1]
UTC−06:00
- The Galápagos Islands, part of Ecuador, which sit far enough west to justify their own offset separate from mainland Ecuador
- Easter Island, part of Chile, during its winter standard time, which is discussed in more detail below
Daylight saving time in South America: a fading tradition with one clear holdout
This is the area where South America has changed the most in recent years, and it is worth walking through country by country rather than assuming the whole continent behaves the same way.
Brazil abolished daylight saving time nationwide starting with the 2019 to 2020 season. According to the Brazilian Senate’s own record from 25 April 2019, the government confirmed daylight saving time had been permanently ended, after previously applying only to a handful of southern and southeastern states such as São Paulo, Rio de Janeiro, and the Distrito Federal [3]. All of Brazil has stayed on standard time year round since then [3].
Paraguay is the most recent country to make this shift. Paraguay’s Congress approved a bill to abolish seasonal clock changes on 24 September 2024, President Santiago Peña signed it on 11 October 2024, and it was officially published on 14 October 2024 [2]. Paraguay had already shifted into its regular seasonal daylight saving time on 6 October 2024, so the practical effect of the new law is that the country simply never shifted back, and has stayed at UTC−03:00 ever since [2].
Argentina, Uruguay, Colombia, Ecuador, Peru, Bolivia, and Venezuela do not currently observe any seasonal clock change and keep a single fixed offset all year round [1].
Chile: the one country still running two clocks a year, and getting more complicated
Chile is genuinely the outlier on the continent right now, and its situation has become more layered rather than simpler over the past two years, which makes it worth explaining carefully.
Mainland Chile still observes a seasonal shift between what it calls winter time, at UTC−04:00, and summer time, at UTC−03:00 [5]. In 2026, Chile’s clocks moved back to winter time on 4 April and are scheduled to move forward again to summer time on 5 September, with the summer period running through to early April 2027 [5, 1].
However, two of Chile’s regions have opted out of this seasonal pattern entirely. The Magallanes region, in the country’s far south, has observed a permanent UTC−03:00 offset since 2016 [4]. The Aysén region joined this arrangement more recently, choosing to remain on UTC−03:00 rather than shift back to winter time in April 2025, following a local poll in which 94 percent of respondents supported keeping permanent daylight time [4]. As of 2026, official government decree confirms both Magallanes and Aysén, along with the Chilean Antarctic Territory, will continue to stay on UTC−03:00 indefinitely while the rest of continental Chile keeps changing its clocks twice a year [5].
Chile’s Pacific island territories add a further layer. Easter Island and Salas y Gómez Island follow their own two hour offset from the mainland, shifting between UTC−06:00 in winter and UTC−05:00 in summer, and they make their seasonal adjustment on a slightly different local schedule than the mainland because of how the change is defined at midnight in each zone [1, 5].
Myth versus documented fact
South America’s mix of long standing fixed offsets and recent, region specific exceptions creates room for outdated assumptions, so it is worth separating what is current from what used to be true.
| Claim | Status |
|---|---|
| “All of South America stopped observing daylight saving time years ago” | Myth. Mainland Chile still shifts its clocks twice a year as of 2026, even as most of its neighbors have stopped [5, 1]. |
| “Brazil still uses daylight saving time in its southern states” | Outdated. This was true before the 2019 to 2020 season, but Brazil has kept a single fixed offset nationwide since then [3]. |
| “Paraguay still changes its clocks every October and March” | Outdated. This was accurate through 2024, but Paraguay’s law abolishing the practice took effect that October, and the country has stayed on a single offset since [2]. |
| “All of Chile stopped observing seasonal time changes after Aysén’s decision” | Myth. Only the Magallanes region, the Aysén region, and the Chilean Antarctic Territory are exempt. The rest of continental Chile, along with Easter Island under its own schedule, still changes clocks twice a year [5, 4]. |
| “Every South American country uses a whole hour offset” | True and worth confirming, since this is one continent where the pattern actually holds. Unlike Asia or parts of the Pacific, no South American country currently uses a half hour or 45 minute offset [1]. |
Why this pattern developed the way it did
The broader continental move away from daylight saving time reflects a common finding repeated across several of these national debates. Energy savings from shifting clocks tend to be smaller than expected once modern lighting, heating, and cooling patterns are accounted for, while the disruption to schedules, transport, and cross-border coordination is a real and recurring cost [3]. Brazil’s own government cited exactly this trade off when it ended the practice in 2019, and Paraguay’s parliamentary leadership made a similar argument centered on public health and better use of natural daylight when its bill passed in 2024 [3, 2].
Chile’s continued use of seasonal time, even as it gradually carves out permanent exceptions for specific regions, shows that this is not a settled, one-way trend even within a single country. The southern regions that have opted out did so partly because their extreme latitude means the argument for extending evening daylight in summer applies differently than it does in Chile’s more densely populated central zone [4].
Why this matters for readers outside South America
For readers in Africa or Asia scheduling with South American partners, the practical takeaway is that most of the continent behaves like much of Africa, with a fixed offset that barely moves through the year, which makes long term planning simple. Chile remains the one country where this assumption can catch a traveler or a business partner off guard, especially since its rules now vary by region rather than applying uniformly across the country.
Anyone with a call or a shipment tied to Chile, particularly outside the Santiago area, should confirm whether the specific region involved observes the seasonal shift or has opted for one of the permanent arrangements described above.
Disclaimer
This article is based on publicly documented sources, including official government decrees reported in Chilean and Paraguayan media, Brazilian Senate records, and time zone reference services, current as of September 2026. Regional exceptions within Chile in particular can change with local decree, so readers with an urgent scheduling need should confirm the current status through a live, dated source before finalizing travel or calls. If you spot an error or an update we’ve missed, please get in touch so we can correct it.
References
- [1] South American Time Zones, TimeDate.org
- [2] Paraguay Congress Approves Permanent DST, Time and Date
- [3] Brazil Won’t Change Clocks in 2019, Time and Date
- [4] Aysén Region stays on summer time, Time.is
- [5] Cambio de hora en Chile: el día exacto en que deberás atrasar el reloj, 13.cl
- [6] List of UTC offsets, Wikipedia
- [7] UTC−04:00, Wikipedia
