PDT to Riyadh
+10hPDT
PDTSOURCERiyadh
ASTGreen rows indicate typical business hours (9 AM - 5 PM)
PDT and AST on the World Map
The map below highlights the PDT (Pacific Daylight Time) and AST (Arabia Standard Time) timezone regions across the globe.
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.
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).
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.
PDT to Riyadh Time Difference – Complete Guide
PDT runs on Pacific Daylight Time (PDT) at UTC-07:00. Riyadh runs on Arabian Standard Time (AST) at UTC+03:00. That puts PDT 10 hours ahead of Riyadh — a difference of +10h at the current offsets.
In practice, when it is 9:00 AM in PDT it is 7:00 PM in Riyadh. Midnight in PDT is 10:00 AM in Riyadh. Neither zone observes daylight saving time, so the offset between them stays constant all year.
PDT to Riyadh time conversion table
| PDT (PDT) | Riyadh (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 PDT to Riyadh time
- Scheduling a call from PDT to Riyadh: a 10:00 AM start in PDT lands at 8:00 PM in Riyadh, so you can confirm the slot without doing the arithmetic yourself.
- Handling a +10h gap: PDT and Riyadh 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 Riyadh is 7:00 PM in PDT.
- Watching a live event or market open: PDT viewers need 7:00 PM in Riyadh to catch a 9:00 AM start there, and 2:00 PM if the event is anchored to PDT.
- Always state the zone abbreviation, not just the hour. "3:00 PM PDT" 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 PDT takes the early slot, the next week Riyadh does.
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.
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 PDT and Riyadh
With a +10h offset there is no overlap inside a normal 9 AM – 5 PM day. Riyadh opens at 9:00 AM AST, which is 7:00 PM in PDT, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
PDT and Riyadh have no shared working hours because of the +10h gap. Teams need to alternate early starts or rely on asynchronous handovers.
PDT is 10 hours ahead of Riyadh (PDT 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
PDT
☀ Currently in DST
Standard: UTC-08:00 · DST: UTC-07:00
Clocks fall back on Sun, Nov 1, 2026
Riyadh
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 PDT and Riyadh?
PDT (PDT, UTC-07:00) is 10 hours ahead of Riyadh (AST, UTC+03:00). The gap is currently +10h.
How do I convert PDT time to Riyadh time?
Add +10h to PDT local time. For example, 9:00 AM in PDT is 7:00 PM in Riyadh.
What time is it in Riyadh right now?
Riyadh 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 PDT.
What is the best time to call Riyadh from PDT?
There is no shared working-hours window because of the +10h gap. The closest option is 1:00 PM in PDT, which is 11:00 PM in Riyadh.
Which is ahead, PDT or Riyadh?
PDT is 10 hours ahead of Riyadh. When it is 12:00 PM in PDT it is 10:00 PM in Riyadh.
Do PDT and Riyadh use different time zones?
PDT uses PDT at UTC-07:00, while Riyadh (Saudi Arabia) uses AST at UTC+03:00. The IANA identifiers are America/Los_Angeles and Asia/Riyadh.
Does daylight saving time affect the PDT–Riyadh difference?
Neither zone observes daylight saving time, so the +10h offset between PDT and Riyadh is fixed all year.
Which other cities share PDT's time zone?
PDT also covers Los Angeles, San Francisco, Seattle, Vancouver, Portland.
Which countries use PDT, PDT's zone?
PDT is used in United States (Pacific), Canada (British Columbia), Mexico (Baja California).
Is there a day difference between PDT and Riyadh?
Not normally. The +10h gap only pushes the date over for late-evening times.
What is the time difference between PDT and Riyadh?
Riyadh is +10h from PDT.
What timezone is PDT in?
PDT operates on its local timezone.
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 are the business hours in Riyadh?
Standard business hours in Riyadh are 8:00 AM - 4:00 PM AST (Sunday-Thursday).
Which countries use PDT (Pacific Daylight Time)?
PDT is used in United States (Pacific), Canada (British Columbia), Mexico (Baja California).
Does PDT observe daylight saving time?
Yes, PDT switches to PST during summer months.
What are some interesting facts about PDT?
PDT aligns with MST at UTC-07:00. Tech company earnings calls often reference PDT/PST times.
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 PDT, what time is it in Riyadh?
When it is 12:00 AM (midnight) in PDT (PDT), it is +10h later in Riyadh (AST).
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See every conversion from PDT →·See every conversion from Riyadh →