Brazil Eliminated Daylight Savings Time; Now Reconsidering

Brazil is reconsidering its decision to eliminate daylight saving time (DST) due to climate change-related energy challenges. In 2019, former President Jair Bolsonaro ended the practice, promising a “permanent” solution to clock confusion. However, recent energy emergencies and the prospect of more to come have prompted a reevaluation of this decision.

The elimination of DST was initially popular, as many Brazilians disliked the biannual time changes. Bolsonaro’s decision was supported by studies suggesting minimal energy savings from DST and potential negative health effects. However, the landscape has shifted dramatically since then.

Climate Change Impact

Brazil experienced its worst drought in 70 years in 2024, leading to severe energy shortages. The country’s heavy reliance on hydroelectric power, which accounts for about two-thirds of its electricity generation, made it particularly vulnerable to drought conditions. As climate change continues to affect weather patterns, Brazil faces increasing challenges in meeting its energy needs.

Energy Emergencies

The recent drought forced Brazil to implement emergency measures to conserve energy. These included:

1. Raising electricity prices
2. Urging citizens to reduce consumption
3. Increasing reliance on more expensive and polluting thermal power plants

These measures have put pressure on the government to explore all options for energy conservation, including the reinstatement of DST.

Potential DST Reinstatement

The Brazilian government is now considering bringing back DST as a tool to address energy challenges. Proponents argue that DST could help reduce peak energy demand during early evening hours, potentially alleviating strain on the power grid.

However, the decision is not straightforward. The energy savings from DST are debated, and its effectiveness may vary depending on a country’s geographical location and energy consumption patterns. Additionally, there are concerns about the potential health impacts of time changes, including disrupted sleep patterns and increased risk of heart attacks and strokes.

Political Considerations

The potential reinstatement of DST also has political implications. It would mark a reversal of one of Bolsonaro’s popular policies, which could be seen as a criticism of his administration. The current government must weigh the potential energy benefits against public opinion and political consequences.

Broader Implications

Brazil’s reconsideration of DST highlights the complex challenges countries face in adapting to climate change. As extreme weather events become more frequent and severe, governments may need to reevaluate past decisions and implement new strategies to ensure energy security and sustainability.

The situation also underscores the interconnectedness of climate change, energy policy, and public health. As countries grapple with these issues, they may need to make difficult trade-offs between competing priorities. The outcome of this decision could have significant implications for Brazil’s energy policy and serve as a case study for other nations facing similar challenges.

More information is available here.

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David Shiller

David Shiller is the Publisher of LightNOW, and President of Lighting Solution Development, a North American consulting firm providing business development services to advanced lighting manufacturers. The ALA awarded David the Pillar of the Industry Award. David has co-chaired ALA’s Engineering Committee since 2010. David established MaxLite’s OEM component sales into a multi-million dollar division. He invented GU24 lamps while leading ENERGY STAR lighting programs for the US EPA. David has been published in leading lighting publications, including LD+A, enLIGHTenment Magazine, LEDs Magazine, and more.

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