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America/Porto_Velho

America/Porto_Velho is the IANA time zone for Rondonia in Brazil.

UTC−04:00

Tue, Sep 29 UTC−4 AMT

Offsets and daylight saving time

Standard offset
UTC−04:00
Rule
No daylight saving time: UTC−4 all year.

No clock changes are scheduled in the next three years.

Names

Generic name
Amazon Standard Time
Abbreviation
AMT
Long name
Amazon Standard Time

Use it in code

// JavaScript
new Intl.DateTimeFormat('en-US', { timeZone: 'America/Porto_Velho' })

# Python
from zoneinfo import ZoneInfo
ZoneInfo('America/Porto_Velho')

-- PostgreSQL
SELECT now() AT TIME ZONE 'America/Porto_Velho';

Cities in America/Porto_Velho

Also in this zone: Ji Paraná.

Offset history since 1970

  • 1970–1984: UTC−4
  • 1985–1988: UTC−4 and UTC−3 each year
  • 1989–2026: UTC−4

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