Saudi Arabia to HST
-13hSaudi Arabia
ASTSOURCEHST
HSTGreen rows indicate typical business hours (9 AM - 5 PM)
AST and HST on the World Map
The map below highlights the AST (Arabia Standard Time) and HST (Hawaii Standard 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).
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).
Time Conversion Guide: Saudi Arabia to HST
Saudi Arabia runs on Arabian Standard Time (AST) at UTC+03:00. HST runs on Hawaii Standard Time (HST) at UTC-10:00. That puts Saudi Arabia 13 hours behind HST — a difference of -13h at the current offsets.
In practice, when it is 9:00 AM in Saudi Arabia it is 8:00 PM in HST on the previous day. Midnight in Saudi Arabia is 11:00 AM in HST. Neither zone observes daylight saving time, so the offset between them stays constant all year.
Saudi Arabia to HST time conversion table
| Saudi Arabia (AST) | HST (HST) | Day |
|---|---|---|
| 12:00 AM | 11:00 AM | previous day |
| 6:00 AM | 5:00 PM | previous day |
| 7:00 AM | 6:00 PM | previous day |
| 8:00 AM | 7:00 PM | previous day |
| 9:00 AM | 8:00 PM | previous day |
| 12:00 PM | 11:00 PM | previous day |
| 3:00 PM | 2:00 AM | same day |
| 5:00 PM | 4:00 AM | same day |
| 6:00 PM | 5:00 AM | same day |
| 9:00 PM | 8:00 AM | same day |
Why people convert Saudi Arabia to HST time
- Scheduling a call from Saudi Arabia to HST: a 10:00 AM start in Saudi Arabia lands at 9:00 PM in HST the previous day, so you can confirm the slot without doing the arithmetic yourself.
- Handling a -13h gap: Saudi Arabia and HST 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 HST is 8:00 PM in Saudi Arabia.
- Keeping family and friends in sync: knowing that 8:00 PM in Saudi Arabia is 7:00 AM in HST makes it easy to avoid calling at 3 AM.
- Always state the zone abbreviation, not just the hour. "3:00 PM AST" 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 Saudi Arabia takes the early slot, the next week HST 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 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.
Best time to call between Saudi Arabia and HST
With a -13h offset there is no overlap inside a normal 9 AM – 5 PM day. HST opens at 9:00 AM HST, which is 8:00 PM in Saudi Arabia, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
Saudi Arabia and HST have no shared working hours because of the -13h gap. Teams need to alternate early starts or rely on asynchronous handovers.
Saudi Arabia is 13 hours behind HST (AST UTC+03:00 → HST UTC-10:00). 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 Saudi Arabia and HST?
Saudi Arabia (AST, UTC+03:00) is 13 hours behind HST (HST, UTC-10:00). The gap is currently -13h.
How do I convert Saudi Arabia time to HST time?
Add -13h to Saudi Arabia local time. For example, 9:00 AM in Saudi Arabia is 8:00 PM in HST (previous day).
What time is it in HST right now?
HST uses HST at UTC-10:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -13h offset from Saudi Arabia.
What is the best time to call HST from Saudi Arabia?
There is no shared working-hours window because of the -13h gap. The closest option is 1:00 PM in Saudi Arabia, which is 12:00 AM in HST.
Which is behind, Saudi Arabia or HST?
Saudi Arabia is 13 hours behind HST. When it is 12:00 PM in Saudi Arabia it is 11:00 PM in HST.
Do Saudi Arabia and HST use different time zones?
Saudi Arabia (Saudi Arabia) uses AST at UTC+03:00, while HST uses HST at UTC-10:00. The IANA identifiers are Asia/Riyadh and Pacific/Honolulu.
Does daylight saving time affect the Saudi Arabia–HST difference?
Neither zone observes daylight saving time, so the -13h offset between Saudi Arabia and HST is fixed all year.
Which other cities share Saudi Arabia's time zone?
AST also covers Riyadh, Jeddah, Doha, Kuwait City, Baghdad.
Which countries use AST, Saudi Arabia's zone?
AST is used in Saudi Arabia, Qatar, Kuwait, Bahrain, Iraq, Yemen.
Is there a day difference between Saudi Arabia and HST?
Sometimes. The -13h gap is large enough that 8:00 PM or later in Saudi Arabia already falls on the in HST.
What is the time difference between Saudi Arabia and HST?
HST is -13h from Saudi Arabia.
What timezone is Saudi Arabia in?
Saudi Arabia operates on its local timezone.
What timezone is HST in?
HST operates on its local timezone.
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 HST timezone?
Major cities in the HST timezone include Honolulu, Hilo, Kailua, Pearl City, Kapolei.
What is the UTC offset for HST?
Hawaii Standard Time (HST) is at UTC-10:00.
What should I know about the HST timezone?
Hawaii does not observe daylight saving time. HST is 5 hours behind EST in winter and 6 hours behind EDT in summer.
When is it midnight in Saudi Arabia, what time is it in HST?
When it is 12:00 AM (midnight) in Saudi Arabia (AST), it is -13h later in HST (HST).
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