AWST to Riyadh
-5hAWST
AWSTSOURCERiyadh
ASTGreen rows indicate typical business hours (9 AM - 5 PM)
AWST and AST on the World Map
The map below highlights the AWST (Australian Western Standard Time) and AST (Arabia Standard Time) timezone regions across the globe.
AWST – Australian Western Standard Time
UTC+08:00Australian Western Standard Time (AWST) is the time zone for Western Australia, 8 hours ahead of UTC.
- •Western Australia does not observe daylight saving time.
- •Perth is the most isolated major city in the world.
- •AWST is the same offset as China Standard Time and Singapore Time.
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.
Time Conversion Guide: AWST to Riyadh
AWST runs on Australian Western Standard Time (AWST) at UTC+08:00. Riyadh runs on Arabian Standard Time (AST) at UTC+03:00. That puts AWST 5 hours behind Riyadh — a difference of -5h at the current offsets.
In practice, when it is 9:00 AM in AWST it is 4:00 AM in Riyadh. Midnight in AWST is 7:00 PM in Riyadh. Neither zone observes daylight saving time, so the offset between them stays constant all year.
AWST to Riyadh time conversion table
| AWST (AWST) | Riyadh (AST) | Day |
|---|---|---|
| 12:00 AM | 7:00 PM | previous day |
| 6:00 AM | 1:00 AM | same day |
| 7:00 AM | 2:00 AM | same day |
| 8:00 AM | 3:00 AM | same day |
| 9:00 AM | 4:00 AM | same day |
| 12:00 PM | 7:00 AM | same day |
| 3:00 PM | 10:00 AM | same day |
| 5:00 PM | 12:00 PM | same day |
| 6:00 PM | 1:00 PM | same day |
| 9:00 PM | 4:00 PM | same day |
Why people convert AWST to Riyadh time
- Scheduling a call from AWST to Riyadh: a 10:00 AM start in AWST lands at 5:00 AM in Riyadh, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both AWST and Riyadh are inside the 9-to-5 working day between 2:00 PM and 5:00 PM AWST time (9:00 AM–12:00 PM AST). That is roughly 3 hours of usable overlap.
- Booking travel or deliveries: tracking Riyadh local time against AWST keeps pickup windows and arrival estimates honest across the -5h offset.
- Always state the zone abbreviation, not just the hour. "3:00 PM AWST" is unambiguous; "3 PM" across a -5h gap is not.
- Block 2:00 PM–5:00 PM AWST as the recurring meeting window if you work primarily from AWST and need Riyadh colleagues present.
About AWST (Australian Western Standard Time)
Australian Western Standard Time (AWST) is used in Western Australia. WA does not observe daylight saving time, having rejected it in multiple referendums. Perth is the most remote major city in the world.
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 AWST and Riyadh
Both AWST and Riyadh sit inside the 9 AM – 5 PM working day between 2:00 PM–5:00 PM AWST, which is 9:00 AM–12:00 PM AST. That gives roughly 3 hours of shared time — the safest window for a live call or meeting.
Business hours overlap
AWST and Riyadh overlap for about 3 hours during the working day — enough for meetings if you avoid the edges of the window.
AWST is 5 hours behind Riyadh (AWST UTC+08:00 → AST UTC+03:00). The shared working window is 2:00 PM–5:00 PM AWST. Remember to re-check around daylight-saving transitions.
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 AWST and Riyadh?
AWST (AWST, UTC+08:00) is 5 hours behind Riyadh (AST, UTC+03:00). The gap is currently -5h.
How do I convert AWST time to Riyadh time?
Add -5h to AWST local time. For example, 9:00 AM in AWST is 4:00 AM 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 -5h offset from AWST.
What is the best time to call Riyadh from AWST?
Call between 2:00 PM and 5:00 PM AWST — that maps to 9:00 AM–12:00 PM AST and keeps both parties inside the working day.
Which is behind, AWST or Riyadh?
AWST is 5 hours behind Riyadh. When it is 12:00 PM in AWST it is 7:00 AM in Riyadh.
Do AWST and Riyadh use different time zones?
AWST uses AWST at UTC+08:00, while Riyadh (Saudi Arabia) uses AST at UTC+03:00. The IANA identifiers are Australia/Perth and Asia/Riyadh.
Does daylight saving time affect the AWST–Riyadh difference?
Neither zone observes daylight saving time, so the -5h offset between AWST and Riyadh is fixed all year.
Which other cities share AWST's time zone?
AWST also covers Perth, Mandurah, Bunbury, Geraldton.
Which countries use AWST, AWST's zone?
AWST is used in Australia (Western Australia).
Is there a day difference between AWST and Riyadh?
Not normally. The -5h gap only pushes the date over the previous day.
What is the time difference between AWST and Riyadh?
Riyadh is -5h from AWST.
What timezone is AWST in?
AWST 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 AWST (Australian Western Standard Time)?
AWST is used in Australia (Western Australia).
Does AWST observe daylight saving time?
No, AWST does not observe daylight saving time and remains at UTC+08:00 year-round.
What are some interesting facts about AWST?
Western Australia does not observe daylight saving time. Perth is the most isolated major city in the world.
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 AWST, what time is it in Riyadh?
When it is 12:00 AM (midnight) in AWST (AWST), it is -5h later in Riyadh (AST).
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