Porto Velho

America • Porto_Velho

Brazil

Current local time

00:14:27

Sunday, May 31, 2026

UTC offset

UTC-04:00

No daylight saving changes

Porto_Velho does not observe daylight saving time. Clocks stay on UTC-04:00 all year long.

Timezone details

Identifier
Abbreviation
—
Transitioned
May 30, 2021 at 09:00 PM

Location

Latitude
-8.76666
Longitude
-63.9
Country
Brazil

Amazon Standard Time (AST)

FAQs

Amazon Standard Time (AST) is Brazil's steadfast clock—five cities across the Amazon basin sharing a reliable UTC-04:00 that never springs forward or falls back. No daylight saving means easier logistics and simpler scheduling, whether you're coordinating flights out of Porto Velho or syncing trade calls from Manaus during the seasonal pulse of the rainforest.

  • Which cities in Brazil follow Amazon Standard Time?

    AST covers Manaus, Boa Vista, Porto Velho, Campo Grande, and Cuiabá—key hubs flanking or embedded within the Amazon biome.

  • Does any part of Amazon Standard Time observe daylight saving time?

    No. Amazon Standard Time is fixed at UTC-04:00 year-round, removing the need to adjust schedules or re-plan recurring meetings.

  • Why did these regions stop changing clocks for daylight saving?

    A 2019 presidential decree abolished daylight-saving adjustments in Brazil's North and part of the Center-West regions, reflecting the minimal daylight variation near the equator.

  • How does a fixed UTC-04:00 offset affect cross-border business with neighboring countries?

    Neighboring regions like northern Venezuela (UTC-04) often share the same offset, simplifying coordination, while Andean countries shift between UTC-4 and UTC-5, creating a moving time relationship.

  • Does the Amazon rainforest experience large seasonal changes in daylight hours?

    Because all AST zones are close to the equator, daylight length stays roughly 12 hours throughout the year, making clock changes for daylight saving largely unnecessary.

  • Is Amazon Standard Time the same as BrasĂ­lia Time?

    No. BrasĂ­lia Standard Time (BRT, UTC-03) is one hour ahead of AST; the Amazon zone remains one full hour behind Brazil's political capital.