HST to Saudi Arabia
+13hHST
HSTSOURCESaudi Arabia
ASTGreen rows indicate typical business hours (9 AM - 5 PM)
HST and AST on the World Map
The map below highlights the HST (Hawaii Standard Time) and AST (Arabia Standard Time) timezone regions across the globe.
HST – Hawaii Standard Time
UTC-10:00Hawaii Standard Time (HST) is the time zone for the Hawaiian Islands, 10 hours behind UTC.
- •Hawaii does not observe daylight saving time.
- •HST is 5 hours behind EST in winter and 6 hours behind EDT in summer.
- •Hawaii is one of only two US states that don't observe DST (the other is Arizona).
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).
Time Conversion Guide: HST to Saudi Arabia
HST runs on Hawaii Standard Time (HST) at UTC-10:00. Saudi Arabia runs on Arabian Standard Time (AST) at UTC+03:00. That puts HST 13 hours ahead of Saudi Arabia — a difference of +13h at the current offsets.
In practice, when it is 9:00 AM in HST it is 10:00 PM in Saudi Arabia. Midnight in HST is 1:00 PM in Saudi Arabia. Neither zone observes daylight saving time, so the offset between them stays constant all year.
HST to Saudi Arabia time conversion table
| HST (HST) | Saudi Arabia (AST) | Day |
|---|---|---|
| 12:00 AM | 1:00 PM | same day |
| 6:00 AM | 7:00 PM | same day |
| 7:00 AM | 8:00 PM | same day |
| 8:00 AM | 9:00 PM | same day |
| 9:00 AM | 10:00 PM | same day |
| 12:00 PM | 1:00 AM | next day |
| 3:00 PM | 4:00 AM | next day |
| 5:00 PM | 6:00 AM | next day |
| 6:00 PM | 7:00 AM | next day |
| 9:00 PM | 10:00 AM | next day |
Why people convert HST to Saudi Arabia time
- Scheduling a call from HST to Saudi Arabia: a 10:00 AM start in HST lands at 11:00 PM in Saudi Arabia, so you can confirm the slot without doing the arithmetic yourself.
- Handling a +13h gap: HST 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 10:00 PM in HST.
- Watching a live event or market open: HST viewers need 10:00 PM in Saudi Arabia to catch a 9:00 AM start there, and 11:00 AM if the event is anchored to HST.
- Always state the zone abbreviation, not just the hour. "3:00 PM HST" is unambiguous; "3 PM" across a +13h gap is not.
- With a +13h gap there is no shared 9-to-5 window, so alternate the early start: one week HST takes the early slot, the next week Saudi Arabia does.
About HST (Hawaii Standard Time)
Hawaii Standard Time (HST) is used in the state of Hawaii and does not observe daylight saving time. This makes HST one of the most consistent time zones in the US. The Hawaiian Islands are among the last places on Earth to see a new calendar day.
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 HST and Saudi Arabia
With a +13h offset there is no overlap inside a normal 9 AM – 5 PM day. Saudi Arabia opens at 9:00 AM AST, which is 10:00 PM in HST, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
HST and Saudi Arabia have no shared working hours because of the +13h gap. Teams need to alternate early starts or rely on asynchronous handovers.
HST is 13 hours ahead of Saudi Arabia (HST UTC-10:00 → 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.
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 HST and Saudi Arabia?
HST (HST, UTC-10:00) is 13 hours ahead of Saudi Arabia (AST, UTC+03:00). The gap is currently +13h.
How do I convert HST time to Saudi Arabia time?
Add +13h to HST local time. For example, 9:00 AM in HST is 10:00 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 +13h offset from HST.
What is the best time to call Saudi Arabia from HST?
There is no shared working-hours window because of the +13h gap. The closest option is 1:00 PM in HST, which is 2:00 AM in Saudi Arabia.
Which is ahead, HST or Saudi Arabia?
HST is 13 hours ahead of Saudi Arabia. When it is 12:00 PM in HST it is 1:00 AM in Saudi Arabia.
Do HST and Saudi Arabia use different time zones?
HST uses HST at UTC-10:00, while Saudi Arabia (Saudi Arabia) uses AST at UTC+03:00. The IANA identifiers are Pacific/Honolulu and Asia/Riyadh.
Does daylight saving time affect the HST–Saudi Arabia difference?
Neither zone observes daylight saving time, so the +13h offset between HST and Saudi Arabia is fixed all year.
Which other cities share HST's time zone?
HST also covers Honolulu, Hilo, Kailua, Pearl City, Kapolei.
Which countries use HST, HST's zone?
HST is used in United States (Hawaii).
Is there a day difference between HST and Saudi Arabia?
Sometimes. The +13h gap is large enough that 8:00 PM or later in HST already falls on the next day in Saudi Arabia.
What is the time difference between HST and Saudi Arabia?
Saudi Arabia is +13h from HST.
What timezone is HST in?
HST operates on its local timezone.
What timezone is Saudi Arabia in?
Saudi Arabia operates on its local timezone.
Which countries use HST (Hawaii Standard Time)?
HST is used in United States (Hawaii).
Does HST observe daylight saving time?
No, HST does not observe daylight saving time and remains at UTC-10:00 year-round.
What are some interesting facts about HST?
Hawaii does not observe daylight saving time. HST is 5 hours behind EST in winter and 6 hours behind EDT in summer.
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 HST, what time is it in Saudi Arabia?
When it is 12:00 AM (midnight) in HST (HST), it is +13h later in Saudi Arabia (AST).
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