Saudi Arabia to MST
-10hSaudi Arabia
ASTSOURCEMST
MSTGreen rows indicate typical business hours (9 AM - 5 PM)
AST and MST on the World Map
The map below highlights the AST (Arabia Standard Time) and MST (Mountain Standard Time) timezone regions across the globe.
AST – Arabia Standard Time
UTC+03:00Arabia Standard Time (AST, UTC+03:00) is the time zone for Saudi Arabia and the other Gulf states of the Arabian peninsula.
- •None of the Gulf states on Arabia Standard Time observe daylight saving.
- •AST is the same offset as Moscow Standard Time and East Africa Time.
- •Riyadh is one hour ahead of Central European Time in winter.
- •The AST abbreviation is shared with Atlantic Standard Time (UTC-04:00).
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.
Everything You Need to Know About Saudi Arabia and MST Time
Saudi Arabia runs on Arabian Standard Time (AST) at UTC+03:00. MST runs on Mountain Standard Time (MST) at UTC-07:00. That puts Saudi Arabia 10 hours behind MST — a difference of -10h at the current offsets.
In practice, when it is 9:00 AM in Saudi Arabia it is 11:00 PM in MST on the previous day. Midnight in Saudi Arabia is 2:00 PM in MST. Neither zone observes daylight saving time, so the offset between them stays constant all year.
Saudi Arabia to MST time conversion table
| Saudi Arabia (AST) | MST (MST) | Day |
|---|---|---|
| 12:00 AM | 2:00 PM | previous day |
| 6:00 AM | 8:00 PM | previous day |
| 7:00 AM | 9:00 PM | previous day |
| 8:00 AM | 10:00 PM | previous day |
| 9:00 AM | 11:00 PM | previous day |
| 12:00 PM | 2:00 AM | same day |
| 3:00 PM | 5:00 AM | same day |
| 5:00 PM | 7:00 AM | same day |
| 6:00 PM | 8:00 AM | same day |
| 9:00 PM | 11:00 AM | same day |
Why people convert Saudi Arabia to MST time
- Scheduling a call from Saudi Arabia to MST: a 10:00 AM start in Saudi Arabia lands at 12:00 AM in MST, so you can confirm the slot without doing the arithmetic yourself.
- Handling a -10h gap: Saudi Arabia 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 11:00 PM in Saudi Arabia.
- Keeping family and friends in sync: knowing that 8:00 PM in Saudi Arabia is 10:00 AM in MST makes it easy to avoid calling at 3 AM.
- Always state the zone abbreviation, not just the hour. "3:00 PM AST" is unambiguous; "3 PM" across a -10h gap is not.
- With a -10h gap there is no shared 9-to-5 window, so alternate the early start: one week Saudi Arabia takes the early slot, the next week MST does.
About AST (Arabia Standard Time)
Arabia Standard Time (AST) is fixed at UTC+03:00 all year across Saudi Arabia, Qatar, Kuwait, Bahrain, Iraq and Yemen. None of these countries observes daylight saving time, so the offset never changes. The abbreviation collides with Atlantic Standard Time (UTC-04:00) used in eastern Canada and the Caribbean; this page covers the Arabian peninsula meaning. Arabia Standard Time is the same offset as Moscow Standard Time and East Africa Time, which makes scheduling with Europe straightforward — Riyadh is one hour ahead of Central European Time in winter and level with it during European summer 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 Saudi Arabia and MST
With a -10h offset there is no overlap inside a normal 9 AM – 5 PM day. MST opens at 9:00 AM MST, which is 11:00 PM in Saudi Arabia, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
Saudi Arabia and MST have no shared working hours because of the -10h gap. Teams need to alternate early starts or rely on asynchronous handovers.
Saudi Arabia is 10 hours behind MST (AST UTC+03:00 → 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
Saudi Arabia
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 Saudi Arabia and MST?
Saudi Arabia (AST, UTC+03:00) is 10 hours behind MST (MST, UTC-07:00). The gap is currently -10h.
How do I convert Saudi Arabia time to MST time?
Add -10h to Saudi Arabia local time. For example, 9:00 AM in Saudi Arabia is 11:00 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 -10h offset from Saudi Arabia.
What is the best time to call MST from Saudi Arabia?
There is no shared working-hours window because of the -10h gap. The closest option is 1:00 PM in Saudi Arabia, which is 3:00 AM in MST.
Which is behind, Saudi Arabia or MST?
Saudi Arabia is 10 hours behind MST. When it is 12:00 PM in Saudi Arabia it is 2:00 AM in MST.
Do Saudi Arabia and MST use different time zones?
Saudi Arabia (Saudi Arabia) uses AST at UTC+03:00, while MST uses MST at UTC-07:00. The IANA identifiers are Asia/Riyadh and America/Denver.
Does daylight saving time affect the Saudi Arabia–MST difference?
Neither zone observes daylight saving time, so the -10h offset between Saudi Arabia and MST is fixed all year.
Which other cities share Saudi Arabia's time zone?
AST also covers Riyadh, Jeddah, Doha, Kuwait City, Baghdad.
Which countries use AST, Saudi Arabia's zone?
AST is used in Saudi Arabia, Qatar, Kuwait, Bahrain, Iraq, Yemen.
Is there a day difference between Saudi Arabia and MST?
Not normally. The -10h gap only pushes the date over the previous day.
What is the time difference between Saudi Arabia and MST?
MST is -10h from Saudi Arabia.
What timezone is Saudi Arabia in?
Saudi Arabia operates on its local timezone.
What timezone is MST in?
MST operates on its local timezone.
Which countries use AST (Arabia Standard Time)?
AST is used in Saudi Arabia, Qatar, Kuwait, Bahrain, Iraq, Yemen.
Does AST observe daylight saving time?
No, AST does not observe daylight saving time and remains at UTC+03:00 year-round.
What are some interesting facts about AST?
None of the Gulf states on Arabia Standard Time observe daylight saving. AST is the same offset as Moscow Standard Time and East Africa Time.
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 Saudi Arabia, what time is it in MST?
When it is 12:00 AM (midnight) in Saudi Arabia (AST), it is -10h later in MST (MST).
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