MST to Saudi Arabia
+10hMST
MSTSOURCESaudi Arabia
ASTGreen rows indicate typical business hours (9 AM - 5 PM)
MST and AST on the World Map
The map below highlights the MST (Mountain Standard Time) and AST (Arabia 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.
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).
Everything You Need to Know About MST and Saudi Arabia Time
MST runs on Mountain Standard Time (MST) at UTC-07:00. Saudi Arabia runs on Arabian Standard Time (AST) at UTC+03:00. That puts MST 10 hours ahead of Saudi Arabia — a difference of +10h at the current offsets.
In practice, when it is 9:00 AM in MST it is 7:00 PM in Saudi Arabia. Midnight in MST is 10:00 AM in Saudi Arabia. Neither zone observes daylight saving time, so the offset between them stays constant all year.
MST to Saudi Arabia time conversion table
| MST (MST) | Saudi Arabia (AST) | Day |
|---|---|---|
| 12:00 AM | 10:00 AM | same day |
| 6:00 AM | 4:00 PM | same day |
| 7:00 AM | 5:00 PM | same day |
| 8:00 AM | 6:00 PM | same day |
| 9:00 AM | 7:00 PM | same day |
| 12:00 PM | 10:00 PM | same day |
| 3:00 PM | 1:00 AM | next day |
| 5:00 PM | 3:00 AM | next day |
| 6:00 PM | 4:00 AM | next day |
| 9:00 PM | 7:00 AM | next day |
Why people convert MST to Saudi Arabia time
- Scheduling a call from MST to Saudi Arabia: a 10:00 AM start in MST lands at 8:00 PM in Saudi Arabia, so you can confirm the slot without doing the arithmetic yourself.
- Handling a +10h gap: MST and Saudi Arabia 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 Saudi Arabia is 7:00 PM in MST.
- Coordinating a MST-based team with Saudi Arabia 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 MST" 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 MST takes the early slot, the next week Saudi Arabia 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 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.
Best time to call between MST and Saudi Arabia
With a +10h offset there is no overlap inside a normal 9 AM – 5 PM day. Saudi Arabia opens at 9:00 AM AST, which is 7:00 PM in MST, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
MST and Saudi Arabia have no shared working hours because of the +10h gap. Teams need to alternate early starts or rely on asynchronous handovers.
MST is 10 hours ahead of Saudi Arabia (MST UTC-07:00 → AST UTC+03:00). 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
Saudi Arabia
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 Saudi Arabia?
MST (MST, UTC-07:00) is 10 hours ahead of Saudi Arabia (AST, UTC+03:00). The gap is currently +10h.
How do I convert MST time to Saudi Arabia time?
Add +10h to MST local time. For example, 9:00 AM in MST is 7:00 PM in Saudi Arabia.
What time is it in Saudi Arabia right now?
Saudi Arabia uses AST at UTC+03:00. Use the live converter at the top of this page — it updates in real time and already accounts for the +10h offset from MST.
What is the best time to call Saudi Arabia from MST?
There is no shared working-hours window because of the +10h gap. The closest option is 1:00 PM in MST, which is 11:00 PM in Saudi Arabia.
Which is ahead, MST or Saudi Arabia?
MST is 10 hours ahead of Saudi Arabia. When it is 12:00 PM in MST it is 10:00 PM in Saudi Arabia.
Do MST and Saudi Arabia use different time zones?
MST uses MST at UTC-07:00, while Saudi Arabia (Saudi Arabia) uses AST at UTC+03:00. The IANA identifiers are America/Denver and Asia/Riyadh.
Does daylight saving time affect the MST–Saudi Arabia difference?
Neither zone observes daylight saving time, so the +10h offset between MST and Saudi Arabia 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 Saudi Arabia?
Not normally. The +10h gap only pushes the date over for late-evening times.
What is the time difference between MST and Saudi Arabia?
Saudi Arabia is +10h from MST.
What timezone is MST in?
MST operates on its local timezone.
What timezone is Saudi Arabia in?
Saudi Arabia 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 AST timezone?
Major cities in the AST timezone include Riyadh, Jeddah, Doha, Kuwait City, Baghdad.
What is the UTC offset for AST?
Arabia Standard Time (AST) is at UTC+03:00.
What should I know about the AST timezone?
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.
When is it midnight in MST, what time is it in Saudi Arabia?
When it is 12:00 AM (midnight) in MST (MST), it is +10h later in Saudi Arabia (AST).
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