Riyadh to PDT
-10hRiyadh
ASTSOURCEPDT
PDTGreen rows indicate typical business hours (9 AM - 5 PM)
AST and PDT on the World Map
The map below highlights the AST (Arabia Standard Time) and PDT (Pacific Daylight 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).
PDT – Pacific Daylight Time
UTC-07:00Pacific Daylight Time (PDT) is the daylight saving offset on the US/Canada Pacific coast, 7 hours behind UTC.
- •PDT aligns with MST at UTC-07:00.
- •Tech company earnings calls often reference PDT/PST times.
About Riyadh
WikipediaRiyadh operates on Arabia Standard Time (AST), UTC+3. As OPEC's de facto capital and home to Tadawul, Riyadh time impacts global energy markets.
Riyadh is growing rapidly as part of Saudi Vision 2030 modernization.
Comparing Time Zones: Riyadh and PDT
Riyadh runs on Arabian Standard Time (AST) at UTC+03:00. PDT runs on Pacific Daylight Time (PDT) at UTC-07:00. That puts Riyadh 10 hours behind PDT — a difference of -10h at the current offsets.
In practice, when it is 9:00 AM in Riyadh it is 11:00 PM in PDT on the previous day. Midnight in Riyadh is 2:00 PM in PDT. Neither zone observes daylight saving time, so the offset between them stays constant all year.
Riyadh to PDT time conversion table
| Riyadh (AST) | PDT (PDT) | 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 Riyadh to PDT time
- Scheduling a call from Riyadh to PDT: a 10:00 AM start in Riyadh lands at 12:00 AM in PDT, so you can confirm the slot without doing the arithmetic yourself.
- Handling a -10h gap: Riyadh and PDT 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 PDT is 11:00 PM in Riyadh.
- Booking travel or deliveries: tracking PDT local time against Riyadh keeps pickup windows and arrival estimates honest across the -10h offset.
- 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 Riyadh takes the early slot, the next week PDT 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 PDT (Pacific Daylight Time)
Pacific Daylight Time (PDT) is observed from March to November on the Pacific coast. During PDT, the west coast is 7 hours behind UTC and only 2 hours behind the east coast's EDT.
Best time to call between Riyadh and PDT
With a -10h offset there is no overlap inside a normal 9 AM – 5 PM day. PDT opens at 9:00 AM PDT, which is 11:00 PM in Riyadh, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
Riyadh and PDT have no shared working hours because of the -10h gap. Teams need to alternate early starts or rely on asynchronous handovers.
Riyadh is 10 hours behind PDT (AST UTC+03:00 → PDT 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
Riyadh
Does not observe DST
PDT
☀ Currently in DST
Standard: UTC-08:00 · DST: UTC-07:00
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 Riyadh and PDT?
Riyadh (AST, UTC+03:00) is 10 hours behind PDT (PDT, UTC-07:00). The gap is currently -10h.
How do I convert Riyadh time to PDT time?
Add -10h to Riyadh local time. For example, 9:00 AM in Riyadh is 11:00 PM in PDT (previous day).
What time is it in PDT right now?
PDT uses PDT 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 Riyadh.
What is the best time to call PDT from Riyadh?
There is no shared working-hours window because of the -10h gap. The closest option is 1:00 PM in Riyadh, which is 3:00 AM in PDT.
Which is behind, Riyadh or PDT?
Riyadh is 10 hours behind PDT. When it is 12:00 PM in Riyadh it is 2:00 AM in PDT.
Do Riyadh and PDT use different time zones?
Riyadh (Saudi Arabia) uses AST at UTC+03:00, while PDT uses PDT at UTC-07:00. The IANA identifiers are Asia/Riyadh and America/Los_Angeles.
Does daylight saving time affect the Riyadh–PDT difference?
Neither zone observes daylight saving time, so the -10h offset between Riyadh and PDT is fixed all year.
Which other cities share Riyadh's time zone?
AST also covers Riyadh, Jeddah, Doha, Kuwait City, Baghdad.
Which countries use AST, Riyadh's zone?
AST is used in Saudi Arabia, Qatar, Kuwait, Bahrain, Iraq, Yemen.
Is there a day difference between Riyadh and PDT?
Not normally. The -10h gap only pushes the date over the previous day.
What is the time difference between Riyadh and PDT?
PDT is -10h from Riyadh.
What timezone is Riyadh in?
Riyadh operates on Arabia Standard Time (AST), UTC+3. As OPEC's de facto capital and home to Tadawul, Riyadh time impacts global energy markets.
What timezone is PDT in?
PDT operates on its local timezone.
What are the business hours in Riyadh?
Standard business hours in Riyadh are 8:00 AM - 4:00 PM AST (Sunday-Thursday).
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 PDT timezone?
Major cities in the PDT timezone include Los Angeles, San Francisco, Seattle, Vancouver, Portland.
What is the UTC offset for PDT?
Pacific Daylight Time (PDT) is at UTC-07:00. During daylight saving time, it shifts to PST.
What should I know about the PDT timezone?
PDT aligns with MST at UTC-07:00. Tech company earnings calls often reference PDT/PST times.
When is it midnight in Riyadh, what time is it in PDT?
When it is 12:00 AM (midnight) in Riyadh (AST), it is -10h later in PDT (PDT).
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