Current Time in IANA America/Cuiaba Timezone

Overview and Coverage

America/Cuiaba applies to the Brazilian state of Mato Grosso and parts of the Amazon region. The zone covers major cities such as Cuiabá, Várzea Grande, Rondonópolis, and Sinop. It is one of several Brazilian time zones that do not observe daylight saving, ensuring consistent timekeeping throughout the year.

Offset and Abbreviation

The standard offset is UTC-04:00, commonly denoted as AMT (Amazon Time). However, note that AMT also refers to Armenia Time (UTC+04:00). In Brazil, the abbreviation is often simply -04 or BRT-1 (Brazil Time minus 1 hour). The zone is 4 hours behind Coordinated Universal Time.

Daylight Saving Behavior

America/Cuiaba does not observe daylight saving time. Brazil previously used DST in some regions, but since 2019, the country has abolished the practice. Consequently, the offset remains constant at UTC-04:00 all year, eliminating the need for biannual clock changes.

Main Countries and Cities

The only country using America/Cuiaba is Brazil. Key cities include:

• Cuiabá (capital of Mato Grosso)
• Várzea Grande (adjacent to Cuiabá)
• Rondonópolis (major agricultural hub)
• Sinop (northern Mato Grosso)
• Cáceres (historical city near the Pantanal)

Other IANA zones at the same offset (UTC-04:00) include America/Campo_Grande, America/Boa_Vista, and several Caribbean zones, but these belong to different regions or countries.

Practical Guidance for Scheduling

When scheduling calls or business hours with America/Cuiaba, note the following overlaps:

• New York (UTC-05:00 standard, UTC-04:00 DST): During US DST, Cuiabá matches New York time. During US standard time, Cuiabá is 1 hour ahead.
• London (UTC+00:00 standard, UTC+01:00 DST): Cuiabá is 4 or 5 hours behind London depending on DST.
• Tokyo (UTC+09:00): Cuiabá is 13 hours behind Tokyo.
• Sydney (UTC+10:00 standard, UTC+11:00 DST): Cuiabá is 14 or 15 hours behind Sydney.

Because Cuiabá does not observe DST, its offset relative to DST-observing zones changes twice a year. Always check the current DST status of the other location. For example, during US summer, New York (EDT, UTC-04:00) is the same as Cuiabá; during US winter, New York (EST, UTC-05:00) is 1 hour behind.

Business Hours Overlap

For a typical 9:00 AM to 5:00 PM workday in Cuiabá (UTC-04:00), the corresponding times in other financial centers are:

• New York (EST/EDT): 8:00 AM to 4:00 PM (EST) or 9:00 AM to 5:00 PM (EDT).
• London (GMT/BST): 1:00 PM to 9:00 PM (GMT) or 2:00 PM to 10:00 PM (BST).
• Tokyo (JST): 10:00 PM to 6:00 AM (next day).
• Sydney (AEST/AEDT): 11:00 PM to 7:00 AM (AEST) or midnight to 8:00 AM (AEDT).

Best overlap for transatlantic calls: mid-morning in Cuiabá corresponds to early afternoon in London and late morning in New York.