São Paulo, Brazil · UTC-3 ☆

São Paulo is the largest city in the Southern Hemisphere, a sprawling megalopolis of approximately 21.5 million in the metropolitan area. It runs on Brasília Time, which is UTC-3. Brazil abolished daylight saving time in 2019, ending a seasonal practice that had applied to the southern states (including São Paulo) for decades.

Bolsonaro, golf courses, and the death of Brazilian DST

The official justification for Brazil’s 2019 abolition of daylight saving was energy savings. The government commissioned a study from the Electrical Energy Research Centre (CEPEL) that found Brazil’s seasonal energy consumption patterns had shifted since DST was first introduced in the 1930s: air conditioning load, which runs against DST’s logic in a tropical country, had grown to dominate the evening demand curve. The argument that clocks should advance to save lighting energy made less sense in a country where the real evening cost was cooling, not illumination.

This analysis was sound. But the announcement from then-President Jair Bolsonaro added a detail that became infamous: he had consulted with golfers who found that daylight saving disrupted their afternoon rounds. The golf course comment, delivered at a press conference in January 2019, became Brazil’s shorthand for the entire decision. Critics noted that São Paulo’s golf clubs have a membership demographic that represents a vanishingly small fraction of the city’s 22 million people, many of whom commute two hours each way in traffic that routinely seizes the Marginal Pinheiros and Marginal Tietê from 6am to midnight.

The comment was widely mocked. But the underlying energy argument was not wrong, and the operational simplification for a country of continental scale was genuine. Brazil’s DST had never applied uniformly: the northern and northeastern states, close enough to the equator that seasonal variation is minimal, had never participated. This meant that for four months of the year, Brazil split into multiple effective time zones within a single official zone, creating confusion for airlines, banks, broadcasters, and anyone scheduling a call between São Paulo and Fortaleza. Abolishing DST unified the country’s clocks in the same stroke.

traffic as the real clock of São Paulo

Since 2019, São Paulo has stayed at UTC-3 year-round. The fixed timezone simplified one dimension of an urban life defined by temporal unpredictability.

Rush hour in São Paulo is not a period. It is a condition. The city’s famous gridlock, measured annually by traffic consultancy TomTom, routinely places São Paulo in the top five most congested cities in the world. The Marginal Pinheiros, the expressway running along the Pinheiros river, carries approximately 200,000 vehicles daily and backs up at 7am, stays backed up until 10am, eases briefly, and backs up again from 5pm to 9pm. Paulistanos who can afford it arrange their working day around the expressways. Paulistanos who cannot spend the equivalent of weeks each year in traffic.

The Bolsonaro golf course story became the symbol of a decision made by people for whom traffic is not a lived constraint. What abolishing DST meant for the city’s millions of bus and metro commuters, whose schedules could now be planned without a March clock shift, was more significant than the headline. The clock that never changes is the one small certainty in a city that offers very few.

the stock exchange and New York alignment

São Paulo is South America’s largest financial centre, and the B3 exchange’s operating hours matter intensely to anyone doing business across the Atlantic or Pacific. UTC-3 puts São Paulo two hours ahead of New York during US Eastern Standard Time and one hour ahead during EDT. This asymmetry, shifting by one hour twice a year because Brazil no longer changes its clocks but the United States does, is a recurring source of confusion for international traders who forget which regime is in effect.

9am in São Paulo is 12pm in London in winter, 1pm during British Summer Time.

Sources

• IANA Time Zone Database
• B3 - Brasil, Bolsa, Balcão
• Brazilian Presidency - Decree 9947/2019
• CEPEL - Centro de Pesquisas de Energia Elétrica

Read more about time in Brazil →