Time zone · Americas
CLT
Chile Standard Time
Chile Standard Time (CLT) is UTC-04:00, the winter time of Santiago and most of mainland Chile, which move to UTC-03:00 for daylight saving from early September to early April. The far-south regions of Aysén and Magallanes stay on UTC-03:00 all year.
Wednesday, October 14, 2026
Current offset
UTC-03:00
Daylight · -03
Daylight saving
Active
Reverts 3 Apr 2027
IANA zones
1
1 observe DST, 0 don't
DST offset
UTC-03:00
CLST · +1h
About CLT
Standard time, with a summer shift.
Chile Standard Time (CLT) is UTC-04:00, the winter time of Santiago and most of mainland Chile, which move to UTC-03:00 for daylight saving from early September to early April. The far-south regions of Aysén and Magallanes stay on UTC-03:00 all year.
DST schedule · CLT · CLST
2027 Saturday · clocks fall back
Clocks fall back by one hour · in 6 months.
One year, two clocks
IANA zones · the technical identifiers
The zone that resolve to CLT.
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.
Cities across CLT
Local time, city by city.
3 cities
Where CLT is used
One country.
Same offset · UTC-03:00
Other zones at UTC-03:00 right now.
These named zones share CLT's offset today. When daylight saving rules differ, they drift apart for part of the year.
Convert
CLT to the world's clocks.
Frequently asked questions
Common questions about CLT, daylight saving, and how to handle it in software. Can't find what you need? Email [email protected].
- Why is CLT set to UTC-04:00 instead of the more familiar UTC-03:00?
- UTC-04:00 is Chile’s standard (winter) time. From early September to early April most of the country moves to UTC-03:00 for daylight saving, shifting daylight into the evening.
- How does CLT's DST schedule compare to the Northern Hemisphere?
- Chile flips the script: its daylight saving period runs from roughly September to March, lining up with the Southern Hemisphere's longer summer days.
- Does all of Chile use CLT?
- Most of mainland Chile, including Santiago, follows CLT. The southern regions of Aysén and Magallanes stay on UTC-03:00 all year, and Easter Island runs two hours behind Santiago.
- When do clocks change for CLT?
- Clocks jump forward from UTC-04:00 to UTC-03:00 in early September and fall back to CLT in early April.
- Is CLT always UTC-04:00?
- CLT itself is always UTC-04:00, but Santiago uses it only from early April to early September. The rest of the year it uses Chile Summer Time, UTC-03:00.
- Why does Chile observe daylight saving at all?
- The policy aims to maximize daylight during social hours, aligning with longer Southern Hemisphere summer days and daily life.
- What's unique about CLT's DST flip?
- Chile starts daylight saving on the first Sunday after 1 September, earlier than New Zealand (last Sunday of September) or southeastern Australia (first Sunday of October), so clocks spring forward while it is still late winter.
Source: IANA tzdb2026d · Reviewed
Free · Developer API
This time zone, as JSON.
Its defining offset, DST status and member counts, from one endpoint.
Also in the API: time zones by coordinates, conversions that flag daylight saving gaps, and abbreviations decoded.
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