Does it account for Daylight Saving Time?

Yes, our converter uses the IANA timezone database, which includes all current DST rules for every timezone in the world.

UTC (Coordinated Universal Time) is the primary time standard by which the world regulates clocks. All timezones are defined as offsets from UTC.

Can I compare multiple timezones at once?

Yes, you can add multiple cities or timezones and see the equivalent times side by side.

How many timezones are there in the world?

There are 38 distinct UTC offsets in use, ranging from UTC-12 to UTC+14. This includes half-hour (UTC+5:30 India, UTC+9:30 Australia) and 45-minute offsets (UTC+5:45 Nepal, UTC+8:45 Australia).

What is the International Date Line?

The International Date Line (IDL) runs roughly along the 180° meridian in the Pacific Ocean. When you cross it westward, you gain a day; crossing eastward, you lose a day.

Why do some timezones have 30 or 45 minute offsets?

Countries chose offsets that best matched their solar noon. India uses UTC+5:30 and Nepal uses UTC+5:45 because standard hourly offsets didn't align well with their geography.

Which country has the most timezones?

France has the most (12 timezones) due to overseas territories. Russia spans 11 timezones. The US has 6 (including Hawaii and Alaska).

ACST to Chile

-12h 30m

ACST

ACSTSOURCE

UTC+09:30DST observed

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Chile

CLST

UTC-03:00☀ DST active

HH11

MM30

(previous day)23:30 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

ACST

Chile

12:00 AM

11:30 AM-1

2:00 AM

1:30 PM-1

4:00 AM

3:30 PM-1

6:00 AM

5:30 PM-1

8:00 AM

7:30 PM-1

10:00 AM

9:30 PM-1

12:00 PM

11:30 PM-1

2:00 PM

1:30 AM

4:00 PM

3:30 AM

6:00 PM

5:30 AM

8:00 PM

7:30 AM

10:00 PM

9:30 AM

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

ACST and CLST on the World Map

The map below highlights the ACST (Australian Central Standard Time) and CLST (Chile Standard Time) timezone regions across the globe.

ACST Zone

→

CLST Zone

Explore all world timezones interactively →

ACST – Australian Central Standard Time

UTC+09:30

Australian Central Standard Time (ACST, UTC+09:30) covers South Australia and the Northern Territory, on a half-hour offset.

Countries in ACST

Australia (South Australia, Northern Territory)

Major Cities in ACST

AdelaideDarwinAlice SpringsMount Gambier

Key Facts about ACST

•ACST uses a half-hour offset: UTC+09:30.
•South Australia moves to ACDT (UTC+10:30) in summer; the Northern Territory does not.
•Adelaide and Darwin are 30 minutes apart during daylight saving, level in winter.
•Adelaide is one of the few major cities on a 30-minute offset.

Daylight Saving:Yes – switches to ACDT

Learn more about ACST on Wikipedia

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

ACST vs Chile: Offsets, DST and Best Call Times

ACST runs on Australian Central Standard Time (ACST) at UTC+09:30. Chile runs on Chile Summer Time (CLST) at UTC-03:00, also currently on daylight saving time. That puts ACST 12 hours 30 minutes behind Chile — a difference of -12h 30m at the current offsets.

In practice, when it is 9:00 AM in ACST it is 8:30 PM in Chile on the previous day. Midnight in ACST is 11:30 AM in Chile.Chile observes daylight saving time while ACST does not, so the gap narrows or widens by an hour part of the year.

ACST to Chile time conversion table

ACST (ACST)	Chile (CLST)	Day
12:00 AM	11:30 AM	previous day
6:00 AM	5:30 PM	previous day
7:00 AM	6:30 PM	previous day
8:00 AM	7:30 PM	previous day
9:00 AM	8:30 PM	previous day
12:00 PM	11:30 PM	previous day
3:00 PM	2:30 AM	same day
5:00 PM	4:30 AM	same day
6:00 PM	5:30 AM	same day
9:00 PM	8:30 AM	same day

Why people convert ACST to Chile time

Scheduling a call from ACST to Chile: a 10:00 AM start in ACST lands at 9:30 PM in Chile the previous day, so you can confirm the slot without doing the arithmetic yourself.
Handling a -12h 30m gap: ACST and Chile have no overlap inside a normal 9-to-5 day, so real-time meetings need an early-morning or late-evening slot on one side. 9:00 AM in Chile is 8:30 PM in ACST.
Watching a live event or market open: ACST viewers need 8:30 PM in Chile to catch a 9:00 AM start there, and 12:30 PM if the event is anchored to ACST.

Always state the zone abbreviation, not just the hour. "3:00 PM ACST" is unambiguous; "3 PM" across a -12h 30m gap is not.
With a -12h 30m gap there is no shared 9-to-5 window, so alternate the early start: one week ACST takes the early slot, the next week Chile does.
Chile: Clocks fall back on Sun, Apr 4, 2027. Any meeting series spanning that date will shift by an hour in local time.

About ACST (Australian Central Standard Time)

Australian Central Standard Time (ACST) is the half-hour offset of UTC+09:30 used across South Australia and the Northern Territory, taking in Adelaide and Darwin. South Australia moves to Australian Central Daylight Time (ACDT, UTC+10:30) from the first Sunday in October to the first Sunday in April, but the Northern Territory does not observe daylight saving — so Adelaide and Darwin sit 30 minutes apart in summer and level with each other in winter. The half-hour offset means Adelaide is 30 minutes behind Sydney in winter and level with it during daylight saving, which regularly catches out travellers and meeting planners.

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.

Best time to call between ACST and Chile

With a -12h 30m offset there is no overlap inside a normal 9 AM – 5 PM day. Chile opens at 9:00 AM CLST, which is 8:30 PM in ACST, so real-time calls need an early-morning or late-evening slot on one side.

Business hours overlap

ACST and Chile have no shared working hours because of the -12h 30m gap. Teams need to alternate early starts or rely on asynchronous handovers.

ACST is 12 hours 30 minutes behind Chile (ACST UTC+09:30 → CLST UTC-03:00). There is no shared 9-to-5 window, so plan around an early or late slot. Remember to re-check around daylight-saving transitions.

🕐 Daylight Saving Time Info

ACST

❄ Currently in Standard Time

Standard: UTC+09:30 · DST: UTC+10:30

Clocks spring forward on Sat, Oct 3, 2026

Chile

☀ Currently in DST

Standard: UTC-04:00 · DST: UTC-03:00

Clocks fall back on Sun, Apr 4, 2027

⚠ These locations are currently in different DST states, so the time difference may change when clocks adjust.

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 ACST and Chile?

ACST (ACST, UTC+09:30) is 12 hours 30 minutes behind Chile (CLST, UTC-03:00). The gap is currently -12h 30m.

How do I convert ACST time to Chile time?

Add -12h 30m to ACST local time. For example, 9:00 AM in ACST is 8:30 PM in Chile (previous day).

What time is it in Chile right now?

Chile uses CLST at UTC-03:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -12h 30m offset from ACST.

What is the best time to call Chile from ACST?

There is no shared working-hours window because of the -12h 30m gap. The closest option is 1:00 PM in ACST, which is 12:30 AM in Chile.

Which is behind, ACST or Chile?

ACST is 12 hours 30 minutes behind Chile. When it is 12:00 PM in ACST it is 11:30 PM in Chile.

Do ACST and Chile use different time zones?

ACST uses ACST at UTC+09:30, while Chile (Chile) uses CLST at UTC-03:00. The IANA identifiers are Australia/Adelaide and America/Santiago.

Does daylight saving time affect the ACST–Chile difference?

Yes at the moment: Chile is on daylight saving time and ACST is not, so the -12h 30m gap shifts by an hour when exactly one of them changes clocks.

Which other cities share ACST's time zone?

ACST also covers Adelaide, Darwin, Alice Springs, Mount Gambier.

Which countries use ACST, ACST's zone?

ACST is used in Australia (South Australia, Northern Territory).

Is there a day difference between ACST and Chile?

Sometimes. The -12h 30m gap is large enough that 8:00 PM or later in ACST already falls on the in Chile.

What is the time difference between ACST and Chile?

Chile is -12h 30m from ACST.

What timezone is ACST in?

ACST operates on its local timezone.

What timezone is Chile in?

Chile operates on its local timezone.

Which countries use ACST (Australian Central Standard Time)?

ACST is used in Australia (South Australia, Northern Territory).

Does ACST observe daylight saving time?

Yes, ACST switches to ACDT during summer months.

What are some interesting facts about ACST?

ACST uses a half-hour offset: UTC+09:30. South Australia moves to ACDT (UTC+10:30) in summer; the Northern Territory does not.

Which cities are in the CLT timezone?

Major cities in the CLT timezone include Santiago, Valparaíso, Concepción, Viña del Mar, Antofagasta.

What is the UTC offset for CLT?

Chile Standard Time (CLT) is at UTC-04:00. During daylight saving time, it shifts to CLST.

What should I know about the CLT timezone?

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.