Current Time in America/Manaus Time Zone
IANA Name: America/Manaus
Standard Offset: UTC −04:00
Daylight Saving: No
Currently Observing DST: No ❌
America/Manaus: The Amazon Time Zone
America/Manaus is the IANA time zone identifier for the western Brazilian state of Amazonas and parts of surrounding states. It operates at a fixed offset of UTC-04:00 year-round, with no daylight saving time. This zone governs the rhythm of life in the heart of the Amazon rainforest, anchored by the city of Manaus.
Geographic Scope and Usage
America/Manaus covers the Brazilian state of Amazonas (including its capital Manaus), as well as the states of Rondônia, Roraima, and portions of Mato Grosso and Acre. It is one of four time zones used within Brazil. The zone is defined by the IANA time zone database and is the standard for the western Amazon region. No other country uses this zone; it is exclusive to Brazil.
Offset and Abbreviation
The standard offset is UTC-04:00, meaning local time is four hours behind Coordinated Universal Time. The common abbreviation for this offset is AMT (Amazon Time). However, note that AMT is also used for Armenia Time (UTC+04:00), so context is important. In Brazil, this offset is often referred to as Fuso do Amazonas or simply -04.
No Daylight Saving Time
America/Manaus does not observe daylight saving time. The offset remains constant at UTC-04:00 throughout the year. Brazil previously observed DST in parts of the country, but Amazonas and other northern states never participated. Since 2019, Brazil has abolished DST entirely, so the entire country now has fixed offsets. In America/Manaus, there is no spring-forward or fall-back; the local time is stable year-round.
Main Cities and Population
The largest city in this zone is Manaus, with a population of over 2 million. Other significant cities include Porto Velho (Rondônia), Boa Vista (Roraima), and Rio Branco (Acre). The zone covers a vast, sparsely populated region of the Amazon basin. The population is concentrated along the Amazon River and its tributaries.
Business Hours and Scheduling
Because America/Manaus does not change offsets, scheduling is straightforward. Standard business hours (9:00 AM to 5:00 PM local) correspond to 13:00 to 21:00 UTC. For calls with North America: New York (UTC-05:00 standard, UTC-04:00 during DST) is 1 hour ahead of Manaus during New York's standard time and the same during its DST. For London (UTC+00:00 standard, UTC+01:00 DST), Manaus is 4 or 5 hours behind. For other Brazilian zones: Brasília (UTC-03:00) is 1 hour ahead; Rio Branco (UTC-05:00) is 1 hour behind. The lack of DST eliminates confusion during transition periods.
Comparison with Other Zones at UTC-04:00
Several other IANA zones share the same standard offset of UTC-04:00, but most observe daylight saving time. For example, America/Campo_Grande (Brazil) and America/Caracas (Venezuela) also use -04, but Venezuela has a different offset (UTC-04:00 with no DST but a half-hour offset historically). The Caribbean zones like America/Anguilla, America/Antigua, America/Aruba, America/Barbados, America/Blanc-Sablon, America/Boa_Vista, America/Cuiaba, America/Curacao, America/Dominica, America/Glace_Bay all use -04, but many of these are in regions that do not observe DST. However, America/Manaus is unique because it is the only zone in Brazil that uses -04 without DST, while other Brazilian zones like America/Campo_Grande and America/Cuiaba also use -04 but historically observed DST. Today, all Brazilian zones are fixed.
Frequently Asked Questions
What is the current time in Manaus?
The current time in Manaus is UTC-04:00 year-round. You can check a world clock for the exact time, but it is always 4 hours behind UTC.
Does Manaus observe daylight saving time?
No, America/Manaus does not observe daylight saving time. The offset is constant at UTC-04:00 throughout the year.
What countries use the America/Manaus time zone?
Only Brazil uses this time zone. It covers the state of Amazonas and parts of Rondônia, Roraima, Mato Grosso, and Acre.
What is the difference between America/Manaus and America/New_York?
America/New_York is UTC-05:00 standard and UTC-04:00 during DST. So Manaus is 1 hour ahead of New York during New York's standard time and the same during New York's DST.
Why is the abbreviation AMT confusing?
AMT stands for Amazon Time (UTC-04:00) but also for Armenia Time (UTC+04:00). Always check the offset to avoid confusion.
What are the major cities in the America/Manaus time zone?
The major cities are Manaus, Porto Velho, Boa Vista, and Rio Branco. Manaus is the largest with over 2 million people.