Manuel Méndez
Lugo, Spain
https://www.timeanddate.com/news/time/brazil-postpones-dst-2018.html
"Brazil Postpones Beginning of DST
Published 4-Oct-2018
The Brazilian authorities have moved the beginning of Daylight Saving
Time (DST) from November 4 to November 18, 2018 to avoid interference
with a nationwide university exam.
According to the announcement, the DST period in Brazil will begin at
00:00 (12:00 midnight) on November 18, 2018. The clock change was
initially scheduled for November 4.
Clock changes in Brazil
Only some parts of Brazil have time changes (see below). Clocks in these
areas will be advanced by 1 hour as DST begins.
Avoid Interference with University Exam
The deferral is designed to prevent the clock change from coinciding
with the Exame Nacional do Ensino Médio (ENEM), a nationwide high school
exam scheduled for November 4-11.
The beginning of DST shortens the night by one hour, resulting in less
sleep, potential health risks, and putting even more strain on students
trying to prepare for Brazil's most important university entrance exam.
States Using DST in Brazil
Only some Brazilian states observe yearly clock changes. They are:
São Paulo
Rio de Janeiro
Distrito Federal
Santa Catarina
Paraná
Goiás
Rio Grande do Sul
Mato Grosso Do Sul
Espírito Santo
Minas Gerais
Mato Grosso (with some exceptions)
Brazil has four time zones, stretching from UTC-2 to UTC-5 (standard
time):
UTC-2: includes areas such as the archipelago of Fernando de
Noronha.
UTC-3: this is largest time zone, comprising eastern and central
areas, and including all states bordering the Atlantic coast (except
some islands), from Pará and Amapá in the north to Rio Grande do Sul in
the south; includes the Brazilian Federal District with the capital
Brasilia.
UTC-4: includes the states of Mato Grosso, Mato Grosso do Sul,
Rondônia, Roraima, and most of Amazonas.
UTC-5: comprises the state of Acre and the westernmost part of
Amazonas (west of Tabatinga / Porto Acre). "
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