Offset
The time difference between Riyadh and Honolulu is 13 hours.
Riyadh (AST) is ahead of Honolulu (HST).
AST: UTC+3
HST: UTC-10
Neither Riyadh nor Honolulu is currently observing daylight saving time.
When to schedule
Standard business hours (9 AM–5 PM, Mon–Fri) in Riyadh and Honolulu don't overlap on the same weekday. Honolulu is 13 hours behind Riyadh.
Realistic options: hand off asynchronously, or stretch one side by an hour to catch the other team at the start or end of their day.
Note: the working week in Saudi Arabia runs Sunday–Thursday; Friday–Saturday is the weekend, so overlap on those days is limited.
Public holidays in 2026
National public holidays can affect availability — a counterpart is likely off work on their own holidays, so it's worth planning meetings and deadlines around them.
United States
- New Year's DayThu, Jan 1
- Martin Luther King, Jr. DayMon, Jan 19
- Presidents DayMon, Feb 16
- Memorial DayMon, May 25
- Juneteenth National Independence DayFri, Jun 19
- Independence DayFri, Jul 3
- Labour DayMon, Sep 7
- Columbus DayMon, Oct 12
- Veterans DayWed, Nov 11
- Thanksgiving DayThu, Nov 26
- Christmas DayFri, Dec 25
About these zones
Quick reference
Full 24-hour conversion table — tap any time to open it in the converter.
| Riyadh | Honolulu | Day |
|---|---|---|
| 12:00 am | 11:00 am | -1 day |
| 1:00 am | 12:00 pm | -1 day |
| 2:00 am | 1:00 pm | -1 day |
| 3:00 am | 2:00 pm | -1 day |
| 4:00 am | 3:00 pm | -1 day |
| 5:00 am | 4:00 pm | -1 day |
| 6:00 am | 5:00 pm | -1 day |
| 7:00 am | 6:00 pm | -1 day |
| 8:00 am | 7:00 pm | -1 day |
| 9:00 am | 8:00 pm | -1 day |
| 10:00 am | 9:00 pm | -1 day |
| 11:00 am | 10:00 pm | -1 day |
| 12:00 pm | 11:00 pm | -1 day |
| 1:00 pm | 12:00 am | Same day |
| 2:00 pm | 1:00 am | Same day |
| 3:00 pm | 2:00 am | Same day |
| 4:00 pm | 3:00 am | Same day |
| 5:00 pm | 4:00 am | Same day |
| 6:00 pm | 5:00 am | Same day |
| 7:00 pm | 6:00 am | Same day |
| 8:00 pm | 7:00 am | Same day |
| 9:00 pm | 8:00 am | Same day |
| 10:00 pm | 9:00 am | Same day |
| 11:00 pm | 10:00 am | Same day |
Daylight saving time
Neither Riyadh nor Honolulu observes daylight saving time. The offset between these zones remains constant year-round.
See the daylight saving time page for transition dates across every time zone.
Daylight today
- Sunrise
- 5:04 AM
- Sunset
- 6:42 PM
- Day length
- 13h 37m
- Sunrise
- 5:50 AM
- Sunset
- 7:13 PM
- Day length
- 13h 23m
Daylight overlap: 3h 9m — 5:04 AM–8:13 AM in Riyadh (4:04 PM–7:13 PM in Honolulu). Both locations are in daylight during this window.
Cities in these zones
Browse all cities to see the current local time anywhere.
Airports in these zones
Airports in Arabia Standard Time
- JED
- RUH
- MED
- DMM
Airports in Hawaii Time
- HNL
Related conversions
Common conversions
- What is 9:00 am Riyadh in Honolulu?
- 9:00 am Riyadh is 8:00 pm Honolulu, the previous day.
- What is 12:00 pm Riyadh in Honolulu?
- 12:00 pm Riyadh is 11:00 pm Honolulu, the previous day.
- What is 12:30 pm Riyadh in Honolulu?
- 12:30 pm Riyadh is 11:30 pm Honolulu, the previous day.
- What is 2:00 pm Riyadh in Honolulu?
- 2:00 pm Riyadh is 1:00 am Honolulu.
- What is 5:00 pm Riyadh in Honolulu?
- 5:00 pm Riyadh is 4:00 am Honolulu.
- What is 11:30 pm Riyadh in Honolulu?
- 11:30 pm Riyadh is 10:30 am Honolulu.