MST to GST
+11hMST
MSTSOURCEGST
GSTGreen rows indicate typical business hours (9 AM - 5 PM)
MST and GST on the World Map
The map below highlights the MST (Mountain Standard Time) and GST (Gulf Standard 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.
GST – Gulf Standard Time
UTC+04:00Gulf Standard Time (GST) is used in the UAE, Oman, and other Gulf states, 4 hours ahead of UTC.
- •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.
MST vs GST: Offsets, DST and Best Call Times
MST runs on Mountain Standard Time (MST) at UTC-07:00. GST runs on Gulf Standard Time (GST) at UTC+04:00. That puts MST 11 hours ahead of GST — a difference of +11h at the current offsets.
In practice, when it is 9:00 AM in MST it is 8:00 PM in GST. Midnight in MST is 11:00 AM in GST. Neither zone observes daylight saving time, so the offset between them stays constant all year.
MST to GST time conversion table
| MST (MST) | GST (GST) | Day |
|---|---|---|
| 12:00 AM | 11:00 AM | same day |
| 6:00 AM | 5:00 PM | same day |
| 7:00 AM | 6:00 PM | same day |
| 8:00 AM | 7:00 PM | same day |
| 9:00 AM | 8:00 PM | same day |
| 12:00 PM | 11:00 PM | same day |
| 3:00 PM | 2:00 AM | next day |
| 5:00 PM | 4:00 AM | next day |
| 6:00 PM | 5:00 AM | next day |
| 9:00 PM | 8:00 AM | next day |
Why people convert MST to GST time
- Scheduling a call from MST to GST: a 10:00 AM start in MST lands at 9:00 PM in GST, so you can confirm the slot without doing the arithmetic yourself.
- Handling a +11h gap: MST 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 8:00 PM in MST.
- Booking travel or deliveries: tracking GST local time against MST keeps pickup windows and arrival estimates honest across the +11h offset.
- Always state the zone abbreviation, not just the hour. "3:00 PM MST" is unambiguous; "3 PM" across a +11h gap is not.
- With a +11h gap there is no shared 9-to-5 window, so alternate the early start: one week MST takes the early slot, the next week GST 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 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 MST and GST
With a +11h offset there is no overlap inside a normal 9 AM – 5 PM day. GST opens at 9:00 AM GST, which is 8:00 PM in MST, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
MST and GST have no shared working hours because of the +11h gap. Teams need to alternate early starts or rely on asynchronous handovers.
MST is 11 hours ahead of GST (MST UTC-07:00 → 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
MST
☀ Currently in DST
Standard: UTC-07:00 · DST: UTC-06:00
Clocks fall back on Sun, Nov 1, 2026
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:
Frequently Asked Questions
What is the time difference between MST and GST?
MST (MST, UTC-07:00) is 11 hours ahead of GST (GST, UTC+04:00). The gap is currently +11h.
How do I convert MST time to GST time?
Add +11h to MST local time. For example, 9:00 AM in MST is 8:00 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 +11h offset from MST.
What is the best time to call GST from MST?
There is no shared working-hours window because of the +11h gap. The closest option is 1:00 PM in MST, which is 12:00 AM in GST.
Which is ahead, MST or GST?
MST is 11 hours ahead of GST. When it is 12:00 PM in MST it is 11:00 PM in GST.
Does daylight saving time affect the MST–GST difference?
Neither zone observes daylight saving time, so the +11h offset between MST and GST 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 GST?
Not normally. The +11h gap only pushes the date over for late-evening times.
What is the time difference between MST and GST?
GST is +11h from MST.
What timezone is MST in?
MST operates on its local timezone.
What timezone is GST in?
GST 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 GST timezone?
Major cities in the GST timezone include Dubai, Abu Dhabi, Muscat, Baku, Tbilisi.
What is the UTC offset for GST?
Gulf Standard Time (GST) is at UTC+04:00.
What should I know about the GST timezone?
Dubai uses GST year-round with no daylight saving time. GST is 9 hours ahead of EST and 4 hours ahead of GMT.
When is it midnight in MST, what time is it in GST?
When it is 12:00 AM (midnight) in MST (MST), it is +11h later in GST (GST).
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