Amazon Summer Time (no longer in use)

AMST: Brazil Amazon Summer Time Zone

AMST was last used in 2019

The time in Brazil is determined at state level. Before the country gave up Daylight Saving Time (DST), in 2019, Amazon Summer Time(AMST) was only used in Mato Grosso o & Mato Grosso do Sul.

The remaining states were on Amazon Standard Time ( AMT ) all year.

Mato Grosso and Mato Grasso do Sul are currently on Amazon Standard Time, AMT = GMT-4

Read more in this article on the Brazilian time, external link