Offset
The time difference between Havana and Riyadh is 7 hours.
Havana (CDT) is behind Riyadh (AST).
CDT: UTC-4
AST: UTC+3
Havana is currently observing daylight saving time; Riyadh is not.
When to schedule
Business-hours overlap: 9 AM–10 AM in Havana (4 PM–5 PM in Riyadh).
Both teams are in working hours during this window on weekdays.
Suggested time: 9:00 AM Havana (4:00 PM Riyadh).
This window may shift by an hour during daylight saving time.
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.
Cuba
- Triumph of the RevolutionThu, Jan 1
- Victory of Fidel CastroFri, Jan 2
- Good FridayFri, Apr 3
- Labour DayFri, May 1
- Day before the Commemoration of the Assault of the Moncada garrisonSat, Jul 25
- Commemoration of the Assault of the Moncada garrisonSun, Jul 26
- Day after the Commemoration of the Assault of the Moncada garrisonMon, Jul 27
- Independence DaySat, Oct 10
- Christmas DayFri, Dec 25
About these zones
Quick reference
Full 24-hour conversion table — tap any time to open it in the converter.
| Havana | Riyadh | Day |
|---|---|---|
| 12:00 am | 7:00 am | Same day |
| 1:00 am | 8:00 am | Same day |
| 2:00 am | 9:00 am | Same day |
| 3:00 am | 10:00 am | Same day |
| 4:00 am | 11:00 am | Same day |
| 5:00 am | 12:00 pm | Same day |
| 6:00 am | 1:00 pm | Same day |
| 7:00 am | 2:00 pm | Same day |
| 8:00 am | 3:00 pm | Same day |
| 9:00 am | 4:00 pm | Same day |
| 10:00 am | 5:00 pm | Same day |
| 11:00 am | 6:00 pm | Same day |
| 12:00 pm | 7:00 pm | Same day |
| 1:00 pm | 8:00 pm | Same day |
| 2:00 pm | 9:00 pm | Same day |
| 3:00 pm | 10:00 pm | Same day |
| 4:00 pm | 11:00 pm | Same day |
| 5:00 pm | 12:00 am | +1 day |
| 6:00 pm | 1:00 am | +1 day |
| 7:00 pm | 2:00 am | +1 day |
| 8:00 pm | 3:00 am | +1 day |
| 9:00 pm | 4:00 am | +1 day |
| 10:00 pm | 5:00 am | +1 day |
| 11:00 pm | 6:00 am | +1 day |
Daylight saving time
Havana observes daylight saving time; Riyadh does not. The offset between the two zones changes when Havana transitions: on Sunday, November 1, 2026, clocks fall back from CDT to CST.
See the daylight saving time page for transition dates across every time zone.
Daylight today
- Sunrise
- 6:44 AM
- Sunset
- 8:15 PM
- Day length
- 13h 31m
- Sunrise
- 5:04 AM
- Sunset
- 6:42 PM
- Day length
- 13h 37m
Cities in these zones
Browse all cities to see the current local time anywhere.
Airports in these zones
Airports in Cuba Standard Time
- HAV
Airports in Arabia Standard Time
- JED
- RUH
- MED
- DMM
Related conversions
Common conversions
- What is 9:00 am Havana in Riyadh?
- 9:00 am Havana is 4:00 pm Riyadh.
- What is 12:00 pm Havana in Riyadh?
- 12:00 pm Havana is 7:00 pm Riyadh.
- What is 12:30 pm Havana in Riyadh?
- 12:30 pm Havana is 7:30 pm Riyadh.
- What is 2:00 pm Havana in Riyadh?
- 2:00 pm Havana is 9:00 pm Riyadh.
- What is 5:00 pm Havana in Riyadh?
- 5:00 pm Havana is 12:00 am Riyadh, the next day.
- What is 11:30 pm Havana in Riyadh?
- 11:30 pm Havana is 6:30 am Riyadh, the next day.