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).

CST to Ho Chi Minh

+13h

CST

CSTSOURCE

UTC-05:00☀ DST active

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Ho Chi Minh

ICT

Vietnam · UTC+07:00

HH01

MM00

(next day)01:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

CST

Ho Chi Minh

12:00 AM

12:00 PM

2:00 AM

2:00 PM

4:00 AM

4:00 PM

6:00 AM

6:00 PM

8:00 AM

8:00 PM

10:00 AM

10:00 PM

12:00 PM

12:00 AM+1

2:00 PM

2:00 AM+1

4:00 PM

4:00 AM+1

6:00 PM

6:00 AM+1

8:00 PM

8:00 AM+1

10:00 PM

10:00 AM+1

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

CST and ICT on the World Map

The map below highlights the CST (Central Standard Time) and ICT (Indochina Time) timezone regions across the globe.

CST Zone

→

ICT Zone

Explore all world timezones interactively →

CST – Central Standard Time

UTC-06:00

Central Standard Time (CST) is the time zone for the central United States, Canada, and Mexico, 6 hours behind UTC.

Countries in CST

United States (Central)Canada (Manitoba, Saskatchewan)MexicoGuatemalaHondurasEl SalvadorCosta RicaNicaraguaBelize

Major Cities in CST

ChicagoHoustonDallasSan AntonioMexico CityAustinWinnipegMemphisMilwaukeeNashvilleKansas CityNew OrleansMinneapolisGuatemala City

Key Facts about CST

•CST covers 20 US states fully or partially.
•Chicago and Houston are the two largest cities in the Central Time Zone.
•Mexico City, one of the world's most populous cities, operates on CST.
•CST is 1 hour behind EST and 2 hours ahead of PST.

Daylight Saving:Yes – switches to CDT

Learn more about CST on Wikipedia

ICT – Indochina Time

UTC+07:00

Indochina Time (ICT) is the time zone for Vietnam, Thailand, Laos, and Cambodia, 7 hours ahead of UTC.

Countries in ICT

ThailandVietnamCambodiaLaosIndonesia (WIB)

Major Cities in ICT

BangkokHo Chi Minh CityHanoiJakartaPhnom PenhVientiane

Key Facts about ICT

•Bangkok is one of the most visited cities in the world.
•ICT is 12 hours ahead of EST.
•Thailand, Vietnam, and Cambodia all share ICT.

Daylight Saving:No – UTC+07:00 year-round

Learn more about ICT on Wikipedia

About Ho Chi Minh

Wikipedia

Ho Chi Minh City operates on Indochina Time (ICT), UTC+7. As Vietnam's economic powerhouse and a manufacturing hub, Saigon drives Southeast Asian trade.

Population:9 million

Metro:13 million

Business Hours:8:00 AM - 5:00 PM ICT

Currency:VND (₫)

Stock Exchange:HOSE (Ho Chi Minh Stock Exchange)

Key Landmarks

Notre-Dame CathedralWar Remnants MuseumBen Thanh MarketIndependence PalaceCu Chi Tunnels

Did You Know?

The city has over 5 million motorbikes, outnumbering cars significantly.

Learn more about ICT timezone →

Comparing Time Zones: CST and Ho Chi Minh

CST runs on Central Standard Time (CST) at UTC-06:00. Ho Chi Minh runs on Indochina Time (ICT) at UTC+07:00. That puts CST 13 hours ahead of Ho Chi Minh — a difference of +13h at the current offsets.

In practice, when it is 9:00 AM in CST it is 10:00 PM in Ho Chi Minh. Midnight in CST is 1:00 PM in Ho Chi Minh. Neither zone observes daylight saving time, so the offset between them stays constant all year.

CST to Ho Chi Minh time conversion table

CST (CST)	Ho Chi Minh (ICT)	Day
12:00 AM	1:00 PM	same day
6:00 AM	7:00 PM	same day
7:00 AM	8:00 PM	same day
8:00 AM	9:00 PM	same day
9:00 AM	10:00 PM	same day
12:00 PM	1:00 AM	next day
3:00 PM	4:00 AM	next day
5:00 PM	6:00 AM	next day
6:00 PM	7:00 AM	next day
9:00 PM	10:00 AM	next day

Why people convert CST to Ho Chi Minh time

Scheduling a call from CST to Ho Chi Minh: a 10:00 AM start in CST lands at 11:00 PM in Ho Chi Minh, so you can confirm the slot without doing the arithmetic yourself.
Handling a +13h gap: CST and Ho Chi Minh 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 Ho Chi Minh is 10:00 PM in CST.
Keeping family and friends in sync: knowing that 8:00 PM in CST is 9:00 AM in Ho Chi Minh makes it easy to avoid calling at 3 AM.

Always state the zone abbreviation, not just the hour. "3:00 PM CST" is unambiguous; "3 PM" across a +13h gap is not.
With a +13h gap there is no shared 9-to-5 window, so alternate the early start: one week CST takes the early slot, the next week Ho Chi Minh does.

About CST (Central Standard Time)

Central Standard Time (CST) covers the central region of North America. It is the second most populous time zone in the US, including major cities like Chicago, Houston, and Dallas. CST is also used in Mexico City and much of Central America including Guatemala, Honduras, El Salvador, and Costa Rica. During summer, most of the US and Canada switch to Central Daylight Time (CDT, UTC-05:00), while Mexico and Central American countries generally remain on CST.

About ICT (Indochina Time)

Indochina Time (ICT) is used across Southeast Asia including Vietnam, Thailand, Laos, and Cambodia. Indonesia (Western time, WIB) also uses UTC+07:00. ICT does not observe daylight saving time.

Best time to call between CST and Ho Chi Minh

With a +13h offset there is no overlap inside a normal 9 AM – 5 PM day. Ho Chi Minh opens at 9:00 AM ICT, which is 10:00 PM in CST, so real-time calls need an early-morning or late-evening slot on one side.

Business hours overlap

CST and Ho Chi Minh have no shared working hours because of the +13h gap. Teams need to alternate early starts or rely on asynchronous handovers.

CST is 13 hours ahead of Ho Chi Minh (CST UTC-06:00 → ICT UTC+07:00). 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

CST

☀ Currently in DST

Standard: UTC-06:00 · DST: UTC-05:00

Clocks fall back on Sun, Nov 1, 2026

Ho Chi Minh

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 CST and Ho Chi Minh?

CST (CST, UTC-06:00) is 13 hours ahead of Ho Chi Minh (ICT, UTC+07:00). The gap is currently +13h.

How do I convert CST time to Ho Chi Minh time?

Add +13h to CST local time. For example, 9:00 AM in CST is 10:00 PM in Ho Chi Minh.

What time is it in Ho Chi Minh right now?

Ho Chi Minh uses ICT at UTC+07:00. Use the live converter at the top of this page — it updates in real time and already accounts for the +13h offset from CST.

What is the best time to call Ho Chi Minh from CST?

There is no shared working-hours window because of the +13h gap. The closest option is 1:00 PM in CST, which is 2:00 AM in Ho Chi Minh.

Which is ahead, CST or Ho Chi Minh?

CST is 13 hours ahead of Ho Chi Minh. When it is 12:00 PM in CST it is 1:00 AM in Ho Chi Minh.

Do CST and Ho Chi Minh use different time zones?

CST uses CST at UTC-06:00, while Ho Chi Minh (Vietnam) uses ICT at UTC+07:00. The IANA identifiers are America/Chicago and Asia/Ho_Chi_Minh.

Does daylight saving time affect the CST–Ho Chi Minh difference?

Neither zone observes daylight saving time, so the +13h offset between CST and Ho Chi Minh is fixed all year.

Which other cities share CST's time zone?

CST also covers Chicago, Houston, Dallas, San Antonio, Mexico City, Austin, Winnipeg, Memphis and 6 more.

Which countries use CST, CST's zone?

CST is used in United States (Central), Canada (Manitoba, Saskatchewan), Mexico, Guatemala, Honduras, El Salvador, Costa Rica, Nicaragua and 1 more.

Is there a day difference between CST and Ho Chi Minh?

Sometimes. The +13h gap is large enough that 8:00 PM or later in CST already falls on the next day in Ho Chi Minh.

What is the time difference between CST and Ho Chi Minh?

Ho Chi Minh is +13h from CST.

What timezone is CST in?

CST operates on its local timezone.

What timezone is Ho Chi Minh in?

Ho Chi Minh City operates on Indochina Time (ICT), UTC+7. As Vietnam's economic powerhouse and a manufacturing hub, Saigon drives Southeast Asian trade.