Thailand to MST
-14hThailand
ICTSOURCEMST
MSTGreen rows indicate typical business hours (9 AM - 5 PM)
ICT and MST on the World Map
The map below highlights the ICT (Indochina Time) and MST (Mountain Standard Time) timezone regions across the globe.
ICT – Indochina Time
UTC+07:00Indochina Time (ICT) is the time zone for Vietnam, Thailand, Laos, and Cambodia, 7 hours ahead of UTC.
- •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.
MST – Mountain Standard Time
UTC-07:00Mountain Standard Time (MST) is the time zone for the Mountain region of North America, 7 hours behind UTC.
- •Arizona does not observe daylight saving time, staying on MST year-round.
- •The Navajo Nation in Arizona does observe DST, unlike the rest of the state.
- •Denver, the 'Mile High City', is the largest city fully in MST.
- •MST covers 6 US states entirely and parts of several others.
Thailand to MST Time Difference – Complete Guide
Thailand runs on Indochina Time (ICT) at UTC+07:00. MST runs on Mountain Standard Time (MST) at UTC-07:00. That puts Thailand 14 hours behind MST — a difference of -14h at the current offsets.
In practice, when it is 9:00 AM in Thailand it is 7:00 PM in MST on the previous day. Midnight in Thailand is 10:00 AM in MST. Neither zone observes daylight saving time, so the offset between them stays constant all year.
Thailand to MST time conversion table
| Thailand (ICT) | MST (MST) | Day |
|---|---|---|
| 12:00 AM | 10:00 AM | previous day |
| 6:00 AM | 4:00 PM | previous day |
| 7:00 AM | 5:00 PM | previous day |
| 8:00 AM | 6:00 PM | previous day |
| 9:00 AM | 7:00 PM | previous day |
| 12:00 PM | 10:00 PM | previous day |
| 3:00 PM | 1:00 AM | same day |
| 5:00 PM | 3:00 AM | same day |
| 6:00 PM | 4:00 AM | same day |
| 9:00 PM | 7:00 AM | same day |
Why people convert Thailand to MST time
- Scheduling a call from Thailand to MST: a 10:00 AM start in Thailand lands at 8:00 PM in MST the previous day, so you can confirm the slot without doing the arithmetic yourself.
- Handling a -14h gap: Thailand and MST 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 MST is 7:00 PM in Thailand.
- Keeping family and friends in sync: knowing that 8:00 PM in Thailand is 6:00 AM in MST makes it easy to avoid calling at 3 AM.
- Always state the zone abbreviation, not just the hour. "3:00 PM ICT" is unambiguous; "3 PM" across a -14h gap is not.
- With a -14h gap there is no shared 9-to-5 window, so alternate the early start: one week Thailand takes the early slot, the next week MST 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 MST (Mountain Standard Time)
Mountain Standard Time (MST) covers the Rocky Mountain region of the United States and Canada. Arizona is notable for not observing daylight saving time, staying on MST year-round (except the Navajo Nation). The time zone includes major cities like Denver, Phoenix, Calgary, and Salt Lake City. During summer, most areas switch to Mountain Daylight Time (MDT, UTC-06:00).
Best time to call between Thailand and MST
With a -14h offset there is no overlap inside a normal 9 AM – 5 PM day. MST opens at 9:00 AM MST, which is 7:00 PM in Thailand, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
Thailand and MST have no shared working hours because of the -14h gap. Teams need to alternate early starts or rely on asynchronous handovers.
Thailand is 14 hours behind MST (ICT UTC+07:00 → MST 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
Thailand
Does not observe DST
MST
☀ Currently in DST
Standard: UTC-07:00 · DST: UTC-06:00
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:
Frequently Asked Questions
What is the time difference between Thailand and MST?
Thailand (ICT, UTC+07:00) is 14 hours behind MST (MST, UTC-07:00). The gap is currently -14h.
How do I convert Thailand time to MST time?
Add -14h to Thailand local time. For example, 9:00 AM in Thailand is 7:00 PM in MST (previous day).
What time is it in MST right now?
MST uses MST at UTC-07:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -14h offset from Thailand.
What is the best time to call MST from Thailand?
There is no shared working-hours window because of the -14h gap. The closest option is 1:00 PM in Thailand, which is 11:00 PM in MST.
Which is behind, Thailand or MST?
Thailand is 14 hours behind MST. When it is 12:00 PM in Thailand it is 10:00 PM in MST.
Do Thailand and MST use different time zones?
Thailand (Thailand) uses ICT at UTC+07:00, while MST uses MST at UTC-07:00. The IANA identifiers are Asia/Bangkok and America/Denver.
Does daylight saving time affect the Thailand–MST difference?
Neither zone observes daylight saving time, so the -14h offset between Thailand and MST is fixed all year.
Which other cities share Thailand's time zone?
ICT also covers Bangkok, Ho Chi Minh City, Hanoi, Jakarta, Phnom Penh, Vientiane.
Which countries use ICT, Thailand's zone?
ICT is used in Thailand, Vietnam, Cambodia, Laos, Indonesia (WIB).
Is there a day difference between Thailand and MST?
Sometimes. The -14h gap is large enough that 8:00 PM or later in Thailand already falls on the in MST.
What is the time difference between Thailand and MST?
MST is -14h from Thailand.
What timezone is Thailand in?
Thailand operates on its local timezone.
What timezone is MST in?
MST operates on its local timezone.
Which countries use ICT (Indochina Time)?
ICT is used in Thailand, Vietnam, Cambodia, Laos, Indonesia (WIB).
Does ICT observe daylight saving time?
No, ICT does not observe daylight saving time and remains at UTC+07:00 year-round.
What are some interesting facts about ICT?
Bangkok is one of the most visited cities in the world. ICT is 12 hours ahead of EST.
Which cities are in the MST timezone?
Major cities in the MST timezone include Denver, Phoenix, Salt Lake City, Calgary, Edmonton, Albuquerque, El Paso, Tucson.
What is the UTC offset for MST?
Mountain Standard Time (MST) is at UTC-07:00. During daylight saving time, it shifts to MDT.
What should I know about the MST timezone?
Arizona does not observe daylight saving time, staying on MST year-round. The Navajo Nation in Arizona does observe DST, unlike the rest of the state.
When is it midnight in Thailand, what time is it in MST?
When it is 12:00 AM (midnight) in Thailand (ICT), it is -14h later in MST (MST).
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