Does it handle Daylight Saving Time?

Yes, the tool automatically adjusts for Daylight Saving Time based on the specific date you select, ensuring accurate conversions year-round.

Can I add multiple cities?

Yes, you can add as many cities as you need to the dashboard to compare times across your entire global network simultaneously.

Chile to AST

-1h

Chile

CLSTSOURCE

UTC-03:00☀ DST active

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

AST

UTC-03:00☀ DST active

HH11

MM00

11:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

Chile

AST

12:00 AM

2:00 AM

4:00 AM

6:00 AM

8:00 AM

10:00 AM

12:00 PM

2:00 PM

4:00 PM

6:00 PM

8:00 PM

10:00 PM

Green rows indicate typical business hours (9 AM - 5 PM)

CLST and AST on the World Map

The map below highlights the CLST (Chile Standard Time) and AST (Atlantic Standard Time) timezone regions across the globe.

CLST Zone

→

AST Zone

Explore all world timezones interactively →

CLT – Chile Standard Time

UTC-04:00

Chile Standard Time (CLT) is the time zone for continental Chile, 4 hours behind UTC.

Countries in CLT

Chile

Major Cities in CLT

SantiagoValparaísoConcepciónViña del MarAntofagasta

Key Facts about CLT

•Chile observes daylight saving time, switching to CLST (UTC-03:00) in summer.
•Santiago is the largest city in Chile with over 6 million in the metro area.
•Chile spans over 4,300 km from north to south but uses one timezone.

Daylight Saving:Yes – switches to CLST

Learn more about CLT on Wikipedia

AST – Atlantic Standard Time

UTC-04:00

Atlantic Standard Time (AST) is the time zone for the Canadian Atlantic provinces and the Caribbean, 4 hours behind UTC.

Countries in AST

Canada (Atlantic provinces)Puerto RicoUS Virgin IslandsDominican RepublicVenezuelaBoliviaBarbadosTrinidad and Tobago

Major Cities in AST

HalifaxSan JuanSanto DomingoCaracasLa PazFrederictonCharlottetown

Key Facts about AST

•Puerto Rico uses AST year-round and does not observe DST.
•AST is 1 hour ahead of EST.
•Halifax, the capital of Nova Scotia, is the largest city in AST Canada.

Daylight Saving:Yes – switches to ADT

Learn more about AST on Wikipedia

Comparing Time Zones: Chile and AST

Chile runs on Chile Summer Time (CLST) at UTC-03:00, currently observing daylight saving time. AST runs on Atlantic Standard Time (AST) at UTC-04:00. That puts Chile 1 hour behind AST — a difference of -1h at the current offsets.

In practice, when it is 9:00 AM in Chile it is 8:00 AM in AST. Midnight in Chile is 11:00 PM in AST.Chile observes daylight saving time while AST does not, so the gap narrows or widens by an hour part of the year.

Chile to AST time conversion table

Chile (CLST)	AST (AST)	Day
12:00 AM	11:00 PM	previous day
6:00 AM	5:00 AM	same day
7:00 AM	6:00 AM	same day
8:00 AM	7:00 AM	same day
9:00 AM	8:00 AM	same day
12:00 PM	11:00 AM	same day
3:00 PM	2:00 PM	same day
5:00 PM	4:00 PM	same day
6:00 PM	5:00 PM	same day
9:00 PM	8:00 PM	same day

Why people convert Chile to AST time

Scheduling a call from Chile to AST: a 10:00 AM start in Chile lands at 9:00 AM in AST, so you can confirm the slot without doing the arithmetic yourself.
Finding shared working hours: both Chile and AST are inside the 9-to-5 working day between 10:00 AM and 5:00 PM CLST time (9:00 AM–4:00 PM AST). That is roughly 7 hours of usable overlap.
Keeping family and friends in sync: knowing that 8:00 PM in Chile is 7:00 PM in AST makes it easy to avoid calling at 3 AM.

Always state the zone abbreviation, not just the hour. "3:00 PM CLST" is unambiguous; "3 PM" across a -1h gap is not.
Block 10:00 AM–5:00 PM CLST as the recurring meeting window if you work primarily from Chile and need AST colleagues present.
Chile: Clocks fall back on Sun, Apr 4, 2027. Re-check this page after that date because the offset changes and so does the -1h gap.

About CLT (Chile Standard Time)

Chile Standard Time (CLT) is the standard time in Chile. During summer months (October to March), Chile switches to Chile Summer Time (CLST, UTC-03:00). Chile is the longest north-south country in the world.

About AST (Atlantic Standard Time)

Atlantic Standard Time (AST) covers Canada's Atlantic provinces (Nova Scotia, New Brunswick, Prince Edward Island, and most of Labrador), as well as several Caribbean nations. Puerto Rico and the US Virgin Islands use AST year-round without daylight saving time. The Canadian provinces switch to Atlantic Daylight Time (ADT) in summer.

Best time to call between Chile and AST

Both Chile and AST sit inside the 9 AM – 5 PM working day between 10:00 AM–5:00 PM CLST, which is 9:00 AM–4:00 PM AST. That gives roughly 7 hours of shared time — the safest window for a live call or meeting.

Business hours overlap

Chile and AST share 7 hours of working-hours overlap (10:00 AM–5:00 PM CLST), so scheduling a live meeting is straightforward.

Chile is 1 hour behind AST (CLST UTC-03:00 → AST UTC-04:00). The shared working window is 10:00 AM–5:00 PM CLST. Remember to re-check around daylight-saving transitions.

🕐 Daylight Saving Time Info

Chile

☀ Currently in DST

Standard: UTC-04:00 · DST: UTC-03:00

Clocks fall back on Sun, Apr 4, 2027

AST

☀ Currently in DST

Standard: UTC-04:00 · DST: UTC-03:00

Clocks fall back on Sun, Nov 1, 2026

Learn More About Time

Dive deeper into the fascinating world of timekeeping, time zones, and how they shape our global society:

⏳

History of Timekeeping

From sundials to atomic clocks - 5000 years of measuring time

🌍

How Time Zones Work

UTC, offsets, and why zones don't follow straight lines

☀️

Daylight Saving Time

DST dates, which countries observe it, and the ongoing debate

Frequently Asked Questions

What is the time difference between Chile and AST?

Chile (CLST, UTC-03:00) is 1 hour behind AST (AST, UTC-04:00). The gap is currently -1h.

How do I convert Chile time to AST time?

Add -1h to Chile local time. For example, 9:00 AM in Chile is 8:00 AM in AST.

What time is it in AST right now?

AST uses AST at UTC-04:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -1h offset from Chile.

What is the best time to call AST from Chile?

Call between 10:00 AM and 5:00 PM CLST — that maps to 9:00 AM–4:00 PM AST and keeps both parties inside the working day.

Which is behind, Chile or AST?

Chile is 1 hour behind AST. When it is 12:00 PM in Chile it is 11:00 AM in AST.

Do Chile and AST use different time zones?

Chile (Chile) uses CLST at UTC-03:00, while AST uses AST at UTC-04:00. The IANA identifiers are America/Santiago and America/Halifax.

Does daylight saving time affect the Chile–AST difference?

Yes at the moment: Chile is on daylight saving time and AST is not, so the -1h gap shifts by an hour when exactly one of them changes clocks.

Which other cities share Chile's time zone?

CLST also covers Santiago, Valparaíso, Concepción, Viña del Mar, Antofagasta.

Which countries use CLST, Chile's zone?

CLST is used in Chile.

Is there a day difference between Chile and AST?

Not normally. The -1h gap only pushes the date over the previous day.

What is the time difference between Chile and AST?

AST is -1h from Chile.

What timezone is Chile in?

Chile operates on its local timezone.

What timezone is AST in?

AST operates on its local timezone.

Which countries use CLT (Chile Standard Time)?

CLT is used in Chile.

Does CLT observe daylight saving time?

Yes, CLT switches to CLST during summer months.

What are some interesting facts about CLT?

Chile observes daylight saving time, switching to CLST (UTC-03:00) in summer. Santiago is the largest city in Chile with over 6 million in the metro area.