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).

CLT to GST

+8h

CLT

CLTSOURCE

UTC-03:00☀ DST active

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

GST

UTC+04:00

HH08

MM00

20:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

CLT

GST

12:00 AM

7:00 AM

2:00 AM

9:00 AM

4:00 AM

11:00 AM

6:00 AM

1:00 PM

8:00 AM

3:00 PM

10:00 AM

5:00 PM

12:00 PM

7:00 PM

2:00 PM

9:00 PM

4:00 PM

11:00 PM

6:00 PM

1:00 AM+1

8:00 PM

3:00 AM+1

10:00 PM

5:00 AM+1

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

CLT and GST on the World Map

The map below highlights the CLT (Chile Standard Time) and GST (Gulf Standard Time) timezone regions across the globe.

CLT Zone

→

GST 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

GST – Gulf Standard Time

UTC+04:00

Gulf Standard Time (GST) is used in the UAE, Oman, and other Gulf states, 4 hours ahead of UTC.

Countries in GST

UAEOmanGeorgiaAzerbaijanMauritius

Major Cities in GST

DubaiAbu DhabiMuscatBakuTbilisi

Key Facts about GST

•Dubai uses GST year-round with no daylight saving time.
•GST is 9 hours ahead of EST and 4 hours ahead of GMT.
•The Dubai Financial Market (DFM) operates on GST.

Daylight Saving:No – UTC+04:00 year-round

Learn more about GST on Wikipedia

Comparing Time Zones: CLT and GST

CLT runs on Chile Standard Time (CLT) at UTC-04:00. GST runs on Gulf Standard Time (GST) at UTC+04:00. That puts CLT 8 hours ahead of GST — a difference of +8h at the current offsets.

In practice, when it is 9:00 AM in CLT it is 5:00 PM in GST. Midnight in CLT is 8:00 AM in GST. Neither zone observes daylight saving time, so the offset between them stays constant all year.

CLT to GST time conversion table

CLT (CLT)	GST (GST)	Day
12:00 AM	8:00 AM	same day
6:00 AM	2:00 PM	same day
7:00 AM	3:00 PM	same day
8:00 AM	4:00 PM	same day
9:00 AM	5:00 PM	same day
12:00 PM	8:00 PM	same day
3:00 PM	11:00 PM	same day
5:00 PM	1:00 AM	next day
6:00 PM	2:00 AM	next day
9:00 PM	5:00 AM	next day

Why people convert CLT to GST time

Scheduling a call from CLT to GST: a 10:00 AM start in CLT lands at 6:00 PM in GST, so you can confirm the slot without doing the arithmetic yourself.
Handling a +8h gap: CLT and GST 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 GST is 5:00 PM in CLT.
Coordinating a CLT-based team with GST contacts: quoting times in the other side's local clock — not your own — removes the single biggest source of missed meetings.

Always state the zone abbreviation, not just the hour. "3:00 PM CLT" is unambiguous; "3 PM" across a +8h gap is not.
With a +8h gap there is no shared 9-to-5 window, so alternate the early start: one week CLT takes the early slot, the next week GST does.

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 GST (Gulf Standard Time)

Gulf Standard Time (GST) is the time zone used in the United Arab Emirates, Oman, and other Gulf states. GST does not observe daylight saving time. Dubai and Abu Dhabi, major international business and tourism hubs, operate on GST.

Best time to call between CLT and GST

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

Business hours overlap

CLT and GST have no shared working hours because of the +8h gap. Teams need to alternate early starts or rely on asynchronous handovers.

CLT is 8 hours ahead of GST (CLT UTC-04:00 → GST UTC+04:00). 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

CLT

☀ Currently in DST

Standard: UTC-04:00 · DST: UTC-03:00

Clocks fall back on Sun, Apr 4, 2027

GST

Does not observe DST

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 CLT and GST?

CLT (CLT, UTC-04:00) is 8 hours ahead of GST (GST, UTC+04:00). The gap is currently +8h.

How do I convert CLT time to GST time?

Add +8h to CLT local time. For example, 9:00 AM in CLT is 5:00 PM in GST.

What time is it in GST right now?

GST uses GST at UTC+04:00. Use the live converter at the top of this page — it updates in real time and already accounts for the +8h offset from CLT.

What is the best time to call GST from CLT?

There is no shared working-hours window because of the +8h gap. The closest option is 1:00 PM in CLT, which is 9:00 PM in GST.

Which is ahead, CLT or GST?

CLT is 8 hours ahead of GST. When it is 12:00 PM in CLT it is 8:00 PM in GST.

Does daylight saving time affect the CLT–GST difference?

Neither zone observes daylight saving time, so the +8h offset between CLT and GST is fixed all year.

Which other cities share CLT's time zone?

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

Which countries use CLT, CLT's zone?

CLT is used in Chile.

Is there a day difference between CLT and GST?

Not normally. The +8h gap only pushes the date over for late-evening times.

What is the time difference between CLT and GST?

GST is +8h from CLT.

What timezone is CLT in?

CLT operates on its local timezone.

What timezone is GST in?

GST 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.