Offset
The time difference between Riyadh and San José is 9 hours.
Riyadh (AST) is ahead of San José (CST).
AST: UTC+3
CST: UTC-6
Neither Riyadh nor San José is currently observing daylight saving time.
When to schedule
Standard business hours (9 AM–5 PM, Mon–Fri) in Riyadh and San José don't overlap on the same weekday. San José is 9 hours behind Riyadh.
With some flexibility, there’s a workable window outside standard hours:
- 4 PM–8 PM in Riyadh (7 AM–11 AM in San José) — suggest 6:00 PM Riyadh (9:00 AM San José).
This means an early start or late finish for one side, but it’s a reasonable slot for a one-off meeting.
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.
Costa Rica
- New Year's DayThu, Jan 1
- Maundy ThursdayThu, Apr 2
- Good FridayFri, Apr 3
- Juan Santamaría DaySat, Apr 11
- Labour DayFri, May 1
- Annexation of the Party of Nicoya to Costa RicaSat, Jul 25
- Feast of Our Lady of the AngelsSun, Aug 2
- Mother's DaySat, Aug 15
- Independence DayTue, Sep 15
- Army Abolition DayTue, Dec 1
- Christmas DayFri, Dec 25
About these zones
Quick reference
Full 24-hour conversion table — tap any time to open it in the converter.
| Riyadh | San José | Day |
|---|---|---|
| 12:00 am | 3:00 pm | -1 day |
| 1:00 am | 4:00 pm | -1 day |
| 2:00 am | 5:00 pm | -1 day |
| 3:00 am | 6:00 pm | -1 day |
| 4:00 am | 7:00 pm | -1 day |
| 5:00 am | 8:00 pm | -1 day |
| 6:00 am | 9:00 pm | -1 day |
| 7:00 am | 10:00 pm | -1 day |
| 8:00 am | 11:00 pm | -1 day |
| 9:00 am | 12:00 am | Same day |
| 10:00 am | 1:00 am | Same day |
| 11:00 am | 2:00 am | Same day |
| 12:00 pm | 3:00 am | Same day |
| 1:00 pm | 4:00 am | Same day |
| 2:00 pm | 5:00 am | Same day |
| 3:00 pm | 6:00 am | Same day |
| 4:00 pm | 7:00 am | Same day |
| 5:00 pm | 8:00 am | Same day |
| 6:00 pm | 9:00 am | Same day |
| 7:00 pm | 10:00 am | Same day |
| 8:00 pm | 11:00 am | Same day |
| 9:00 pm | 12:00 pm | Same day |
| 10:00 pm | 1:00 pm | Same day |
| 11:00 pm | 2:00 pm | Same day |
Daylight saving time
Neither Riyadh nor San José 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
- 5:16 AM
- Sunset
- 5:57 PM
- Day length
- 12h 41m
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 Central Standard Time
- SJO
- SYQ
Related conversions
Common conversions
- What is 9:00 am Riyadh in San José?
- 9:00 am Riyadh is 12:00 am San José.
- What is 12:00 pm Riyadh in San José?
- 12:00 pm Riyadh is 3:00 am San José.
- What is 12:30 pm Riyadh in San José?
- 12:30 pm Riyadh is 3:30 am San José.
- What is 2:00 pm Riyadh in San José?
- 2:00 pm Riyadh is 5:00 am San José.
- What is 5:00 pm Riyadh in San José?
- 5:00 pm Riyadh is 8:00 am San José.
- What is 11:30 pm Riyadh in San José?
- 11:30 pm Riyadh is 2:30 pm San José.