Offset
The time difference between Havana and Osaka is 13 hours.
Havana (CDT) is behind Osaka (JST).
CDT: UTC-4
JST: UTC+9
Havana is currently observing daylight saving time; Osaka is not.
When to schedule
Standard business hours (9 AM–5 PM, Mon–Fri) in Havana and Osaka don't overlap on the same weekday. Osaka is 13 hours ahead of Havana.
With some flexibility, there’s a workable window outside standard hours:
- 6 PM–8 PM in Havana (7 AM–9 AM the next day in Osaka) — suggest 7:00 PM Havana (8:00 AM Osaka).
This means an early start or late finish for one side, but it’s a reasonable slot for a one-off meeting.
This window may shift by an hour during daylight saving time.
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
Japan
- New Year's DayThu, Jan 1
- Coming of Age DayMon, Jan 12
- Foundation DayWed, Feb 11
- The Emperor's BirthdayMon, Feb 23
- Vernal Equinox DayFri, Mar 20
- Shōwa DayWed, Apr 29
- Constitution Memorial DayWed, May 6
- Greenery DayMon, May 4
- Children's DayTue, May 5
- Marine DayMon, Jul 20
- Mountain DayTue, Aug 11
- Respect for the Aged DayMon, Sep 21
- Autumnal Equinox DayWed, Sep 23
- Sports DayMon, Oct 12
- Culture DayTue, Nov 3
- Labour Thanksgiving DayMon, Nov 23
About these zones
Quick reference
Full 24-hour conversion table — tap any time to open it in the converter.
| Havana | Osaka | Day |
|---|---|---|
| 12:00 am | 1:00 pm | Same day |
| 1:00 am | 2:00 pm | Same day |
| 2:00 am | 3:00 pm | Same day |
| 3:00 am | 4:00 pm | Same day |
| 4:00 am | 5:00 pm | Same day |
| 5:00 am | 6:00 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 |
| 10:00 am | 11:00 pm | Same day |
| 11:00 am | 12:00 am | +1 day |
| 12:00 pm | 1:00 am | +1 day |
| 1:00 pm | 2:00 am | +1 day |
| 2:00 pm | 3:00 am | +1 day |
| 3:00 pm | 4:00 am | +1 day |
| 4:00 pm | 5:00 am | +1 day |
| 5:00 pm | 6:00 am | +1 day |
| 6:00 pm | 7:00 am | +1 day |
| 7:00 pm | 8:00 am | +1 day |
| 8:00 pm | 9:00 am | +1 day |
| 9:00 pm | 10:00 am | +1 day |
| 10:00 pm | 11:00 am | +1 day |
| 11:00 pm | 12:00 pm | +1 day |
Daylight saving time
Havana observes daylight saving time; Osaka 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
- 4:46 AM
- Sunset
- 7:10 PM
- Day length
- 14h 25m
Daylight overlap: 4h 29m — 3:46 PM–8:15 PM in Havana (4:46 AM–9:15 AM in Osaka). Both locations are in daylight during this window.
Cities in these zones
Other cities in Japan Standard Time
Browse all cities to see the current local time anywhere.
Airports in these zones
Airports in Cuba Standard Time
- HAV
Airports in Japan Standard Time
- HND
- NRT
- ITM
- KIX
- UKB
- NGO
- NKM
- CTS
- OKD
- FUK
Related conversions
Common conversions
- What is 9:00 am Havana in Osaka?
- 9:00 am Havana is 10:00 pm Osaka.
- What is 12:00 pm Havana in Osaka?
- 12:00 pm Havana is 1:00 am Osaka, the next day.
- What is 12:30 pm Havana in Osaka?
- 12:30 pm Havana is 1:30 am Osaka, the next day.
- What is 2:00 pm Havana in Osaka?
- 2:00 pm Havana is 3:00 am Osaka, the next day.
- What is 5:00 pm Havana in Osaka?
- 5:00 pm Havana is 6:00 am Osaka, the next day.
- What is 11:30 pm Havana in Osaka?
- 11:30 pm Havana is 12:30 pm Osaka, the next day.