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).

Vietnam to Mexico City

-13h

Vietnam

ICTSOURCE

UTC+07:00

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Mexico City

CST

Mexico · UTC-06:00

HH11

MM00

(previous day)23:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

Vietnam

Mexico City

12:00 AM

11:00 AM-1

2:00 AM

1:00 PM-1

4:00 AM

3:00 PM-1

6:00 AM

5:00 PM-1

8:00 AM

7:00 PM-1

10:00 AM

9:00 PM-1

12:00 PM

11:00 PM-1

2:00 PM

1:00 AM

4:00 PM

3:00 AM

6:00 PM

5:00 AM

8:00 PM

7:00 AM

10:00 PM

9:00 AM

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

ICT and CST on the World Map

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

ICT Zone

→

CST Zone

Explore all world timezones interactively →

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

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

About Mexico City

Wikipedia

Mexico City operates on Central Time (CST/CDT), same as Chicago. As North America's largest city, Mexico City bridges US and Latin American business hours.

Population:9.2 million

Metro:21.8 million

Business Hours:9:00 AM - 6:00 PM CST

Currency:MXN ($)

Stock Exchange:BMV (Bolsa Mexicana de Valores)

Key Landmarks

ZócaloPalacio de Bellas ArtesChapultepec CastleTemplo MayorAngel of Independence

Did You Know?

Mexico City is the oldest capital city in the Americas.

Learn more about CST timezone →

Comparing Time Zones: Vietnam and Mexico City

Vietnam runs on Indochina Time (ICT) at UTC+07:00. Mexico City runs on Central Standard Time (CST) at UTC-06:00. That puts Vietnam 13 hours behind Mexico City — a difference of -13h at the current offsets.

In practice, when it is 9:00 AM in Vietnam it is 8:00 PM in Mexico City on the previous day. Midnight in Vietnam is 11:00 AM in Mexico City. Neither zone observes daylight saving time, so the offset between them stays constant all year.

Vietnam to Mexico City time conversion table

Vietnam (ICT)	Mexico City (CST)	Day
12:00 AM	11:00 AM	previous day
6:00 AM	5:00 PM	previous day
7:00 AM	6:00 PM	previous day
8:00 AM	7:00 PM	previous day
9:00 AM	8:00 PM	previous day
12:00 PM	11:00 PM	previous day
3:00 PM	2:00 AM	same day
5:00 PM	4:00 AM	same day
6:00 PM	5:00 AM	same day
9:00 PM	8:00 AM	same day

Why people convert Vietnam to Mexico City time

Scheduling a call from Vietnam to Mexico City: a 10:00 AM start in Vietnam lands at 9:00 PM in Mexico City the previous day, so you can confirm the slot without doing the arithmetic yourself.
Handling a -13h gap: Vietnam and Mexico City 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 Mexico City is 8:00 PM in Vietnam.
Coordinating a Vietnam-based team with Mexico City 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 ICT" 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 Vietnam takes the early slot, the next week Mexico City does.

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.

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.

Best time to call between Vietnam and Mexico City

With a -13h offset there is no overlap inside a normal 9 AM – 5 PM day. Mexico City opens at 9:00 AM CST, which is 8:00 PM in Vietnam, so real-time calls need an early-morning or late-evening slot on one side.

Business hours overlap

Vietnam and Mexico City have no shared working hours because of the -13h gap. Teams need to alternate early starts or rely on asynchronous handovers.

Vietnam is 13 hours behind Mexico City (ICT UTC+07:00 → CST UTC-06:00). There is no shared 9-to-5 window, so plan around an early or late slot. Remember to re-check around daylight-saving transitions.

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 Vietnam and Mexico City?

Vietnam (ICT, UTC+07:00) is 13 hours behind Mexico City (CST, UTC-06:00). The gap is currently -13h.

How do I convert Vietnam time to Mexico City time?

Add -13h to Vietnam local time. For example, 9:00 AM in Vietnam is 8:00 PM in Mexico City (previous day).

What time is it in Mexico City right now?

Mexico City uses CST at UTC-06:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -13h offset from Vietnam.

What is the best time to call Mexico City from Vietnam?

There is no shared working-hours window because of the -13h gap. The closest option is 1:00 PM in Vietnam, which is 12:00 AM in Mexico City.

Which is behind, Vietnam or Mexico City?

Vietnam is 13 hours behind Mexico City. When it is 12:00 PM in Vietnam it is 11:00 PM in Mexico City.

Do Vietnam and Mexico City use different time zones?

Vietnam (Vietnam) uses ICT at UTC+07:00, while Mexico City (Mexico) uses CST at UTC-06:00. The IANA identifiers are Asia/Ho_Chi_Minh and America/Mexico_City.

Does daylight saving time affect the Vietnam–Mexico City difference?

Neither zone observes daylight saving time, so the -13h offset between Vietnam and Mexico City is fixed all year.

Which other cities share Vietnam's time zone?

ICT also covers Bangkok, Ho Chi Minh City, Hanoi, Jakarta, Phnom Penh, Vientiane.

Which countries use ICT, Vietnam's zone?

ICT is used in Thailand, Vietnam, Cambodia, Laos, Indonesia (WIB).

Is there a day difference between Vietnam and Mexico City?

Sometimes. The -13h gap is large enough that 8:00 PM or later in Vietnam already falls on the in Mexico City.

What is the time difference between Vietnam and Mexico City?

Mexico City is -13h from Vietnam.

What timezone is Vietnam in?

Vietnam operates on its local timezone.

What timezone is Mexico City in?

Mexico City operates on Central Time (CST/CDT), same as Chicago. As North America's largest city, Mexico City bridges US and Latin American business hours.