Technical Specifications & Standards
Official chronometric properties, ISO standards, and international database registry identifiers for Brasília Time:
Daylight Saving Time (DST) Transitions
⬆️ Spring Forward (Clocks Advance)
None (Brazil abolished Daylight Saving Time in April 2019)
⬇️ Fall Back (Clocks Return)
None
Observing Jurisdictions & Subdivisions
1 Sovereign NationsSovereign nations, administrative subdivisions, and regional territories officially operating under BRT:
Regional Subdivisions & Territory Details
Financial Markets & Trading Hours
São Paulo runs only one or two hours ahead of Wall Street depending on North American daylight saving dates, making real-time cross-border equity trading straightforward.
Local Hours: 10:00 - 17:00 BRT
UTC Window: 12:00 - 20:00 UTC
Major Cities in BRT
Primary metropolitan centers and financial hubs observing this time zone:
Adoption History & Astronomical Facts
Year Established: 1913
Standardized by Decree No. 2,784 on June 18, 1913. Brazil maintained seasonal daylight shifts for decades until President Jair Bolsonaro signed Decree No. 9,772 in 2019, eliminating summer time shifts after energy data confirmed LED lighting and modern air conditioning had flattened evening peak power demand.
Brazil spans four time zones from the Atlantic island of Fernando de Noronha (UTC-2) to the Amazonian border of Acre (UTC-5), but national television networks and federal election results operate strictly on Brasília Time.
Frequently Asked Questions about BRT
What does BRT stand for?
BRT stands for Brasília Time (Horário de Brasília), three hours behind Coordinated Universal Time (UTC-3).
Does Brazil use daylight saving time?
No. Brazil abolished daylight saving time in April 2019; clocks in São Paulo and Rio stay on UTC-3 year-round.
What is the time difference between São Paulo and New York?
São Paulo is two hours ahead of New York in North American winter (EST), and one hour ahead in North American summer (EDT).