Time zone · Americas

AST

Acre Standard Time

Acre Standard Time (AST) is a fixed UTC-05:00 zone used in western Brazil, with no daylight saving adjustments—making scheduling straightforward for residents and collaborators in this Amazon-region time zone.

UTC-05:00 standard2 IANA zones
Current time in AST☾ Night
22:28:10

Saturday, May 30, 2026

☾ NIGHT 06:00noon18:00
Standard
-05 · −5
IANA zones
2

Current offset

UTC-05:00

Standard · -05

Daylight saving

Not observed

Year-round standard time

IANA zones

2

None observe daylight saving

DST offset

No summer variant

About AST

A fixed, year-round offset.

Acre Standard Time (AST) is a fixed UTC-05:00 zone used in western Brazil, with no daylight saving adjustments—making scheduling straightforward for residents and collaborators in this Amazon-region time zone.

IANA zones · the technical identifiers

The 2 zones that resolve to AST.

For software, always store the IANA identifier — never the abbreviation alone. The database keeps these zones distinct because their rules can, and historically did, diverge.

IANA zonePrimary cityDST
America/EirunepeEirunepe— None
America/Rio_BrancoRio_Branco— None

Where AST is used

One country.

Same offset · UTC-05:00

Other zones at UTC-05:00 right now.

These named zones share AST's offset today. When daylight saving rules differ, they drift apart for part of the year.

Frequently asked questions

Common questions about AST, daylight saving, and how to handle it in software. Can't find what you need? Email [email protected].

Does Acre Standard Time observe daylight saving time?
No, AST does not observe daylight saving time; it remains at UTC-05:00 year-round.
Which Brazilian cities use Acre Standard Time?
The primary cities in AST are Eirunepe and Rio Branco, both located in the state of Acre in western Brazil.
What is the current time in Acre Standard Time?
The current time in AST is always UTC-05:00, with no seasonal changes.
How does AST compare to other Brazilian time zones?
AST is one hour behind Brasilia Time (BRT, UTC-03:00) and is used only in the far western part of Brazil.
Why was Acre Standard Time created?
It reflects the geographic position of Acre state, which lies far west of the country's main population centers.
Is AST used outside of Brazil?
No, AST is exclusive to Brazil, specifically in the state of Acre.
What countries border regions using AST?
AST borders Peru (UTC-05:00) and Bolivia (UTC-04:00), facilitating cross-border coordination.
How does AST affect international business?
Its fixed offset simplifies planning with partners in North America’s Eastern Time zone during standard time.

Free · Developer API

Time, as JSON.

Every IANA time zone with live offsets, DST status, and the countries and cities that use them — clean, dependable JSON. Sign up free and get an API key in seconds.

GET /v1/timezones Live

countries, cities, convert, DST transitions coming next.

Get your free API key →
// France's time zones, right now
GET /v1/timezones?country=fr
{
"data": [
{
"iana": "Europe/Paris",
"display_name": "Paris",
"current": {
"utc_offset": "+02:00",
"abbreviation": "CEST",
"is_dst": true
}
}
]
}