MST to ICT
+14hMST
MSTSOURCEICT
ICTGreen rows indicate typical business hours (9 AM - 5 PM)
MST and ICT on the World Map
The map below highlights the MST (Mountain Standard Time) and ICT (Indochina Time) timezone regions across the globe.
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.
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.
Time Conversion Guide: MST to ICT
MST runs on Mountain Standard Time (MST) at UTC-07:00. ICT runs on Indochina Time (ICT) at UTC+07:00. That puts MST 14 hours ahead of ICT — a difference of +14h at the current offsets.
In practice, when it is 9:00 AM in MST it is 11:00 PM in ICT. Midnight in MST is 2:00 PM in ICT. Neither zone observes daylight saving time, so the offset between them stays constant all year.
MST to ICT time conversion table
| MST (MST) | ICT (ICT) | Day |
|---|---|---|
| 12:00 AM | 2:00 PM | same day |
| 6:00 AM | 8:00 PM | same day |
| 7:00 AM | 9:00 PM | same day |
| 8:00 AM | 10:00 PM | same day |
| 9:00 AM | 11:00 PM | same day |
| 12:00 PM | 2:00 AM | next day |
| 3:00 PM | 5:00 AM | next day |
| 5:00 PM | 7:00 AM | next day |
| 6:00 PM | 8:00 AM | next day |
| 9:00 PM | 11:00 AM | next day |
Why people convert MST to ICT time
- Scheduling a call from MST to ICT: a 10:00 AM start in MST lands at 12:00 AM in ICT the next day, so you can confirm the slot without doing the arithmetic yourself.
- Handling a +14h gap: MST and ICT 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 ICT is 11:00 PM in MST.
- Keeping family and friends in sync: knowing that 8:00 PM in MST is 10:00 AM in ICT makes it easy to avoid calling at 3 AM.
- Always state the zone abbreviation, not just the hour. "3:00 PM MST" 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 MST takes the early slot, the next week ICT does.
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).
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 MST and ICT
With a +14h offset there is no overlap inside a normal 9 AM – 5 PM day. ICT opens at 9:00 AM ICT, which is 11:00 PM in MST, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
MST and ICT have no shared working hours because of the +14h gap. Teams need to alternate early starts or rely on asynchronous handovers.
MST is 14 hours ahead of ICT (MST UTC-07:00 → 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
MST
☀ Currently in DST
Standard: UTC-07:00 · DST: UTC-06:00
Clocks fall back on Sun, Nov 1, 2026
ICT
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:
Frequently Asked Questions
What is the time difference between MST and ICT?
MST (MST, UTC-07:00) is 14 hours ahead of ICT (ICT, UTC+07:00). The gap is currently +14h.
How do I convert MST time to ICT time?
Add +14h to MST local time. For example, 9:00 AM in MST is 11:00 PM in ICT.
What time is it in ICT right now?
ICT 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 +14h offset from MST.
What is the best time to call ICT from MST?
There is no shared working-hours window because of the +14h gap. The closest option is 1:00 PM in MST, which is 3:00 AM in ICT.
Which is ahead, MST or ICT?
MST is 14 hours ahead of ICT. When it is 12:00 PM in MST it is 2:00 AM in ICT.
Does daylight saving time affect the MST–ICT difference?
Neither zone observes daylight saving time, so the +14h offset between MST and ICT is fixed all year.
Which other cities share MST's time zone?
MST also covers Denver, Phoenix, Salt Lake City, Calgary, Edmonton, Albuquerque, El Paso, Tucson and 2 more.
Which countries use MST, MST's zone?
MST is used in United States (Mountain), Canada (Alberta), Mexico (Chihuahua, Sonora).
Is there a day difference between MST and ICT?
Sometimes. The +14h gap is large enough that 8:00 PM or later in MST already falls on the next day in ICT.
What is the time difference between MST and ICT?
ICT is +14h from MST.
What timezone is MST in?
MST operates on its local timezone.
What timezone is ICT in?
ICT operates on its local timezone.
Which countries use MST (Mountain Standard Time)?
MST is used in United States (Mountain), Canada (Alberta), Mexico (Chihuahua, Sonora).
Does MST observe daylight saving time?
Yes, MST switches to MDT during summer months.
What are some interesting facts about MST?
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.
Which cities are in the ICT timezone?
Major cities in the ICT timezone include Bangkok, Ho Chi Minh City, Hanoi, Jakarta, Phnom Penh, Vientiane.
What is the UTC offset for ICT?
Indochina Time (ICT) is at UTC+07:00.
What should I know about the ICT timezone?
Bangkok is one of the most visited cities in the world. ICT is 12 hours ahead of EST.
When is it midnight in MST, what time is it in ICT?
When it is 12:00 AM (midnight) in MST (MST), it is +14h later in ICT (ICT).
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See every conversion from MST →·See every conversion from ICT →