Offset
The time difference between Japan Standard Time and Cuba Standard Time is 13 hours.
Japan Standard Time (JST) is ahead of Cuba Standard Time (CDT).
JST: UTC+9
CDT: UTC-4
Cuba Standard Time is currently observing daylight saving time; Japan Standard Time is not.
When to schedule
Standard business hours (9 AM–5 PM, Mon–Fri) in Japan Standard Time and Cuba Standard Time don't overlap on the same weekday. Cuba Standard Time is 13 hours behind Japan Standard Time.
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.
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.
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
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
Japan Standard Time is also known as JST. To call Japan, dial +81.
Cuba Standard Time is also known as CST, or CDT. To call Cuba, dial +53.
Cuba Standard Time is approximately 7,550 miles northeast of Japan Standard Time.
Quick reference
Full 24-hour conversion table — tap any time to open it in the converter.
| JST | CST-CUBA | 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
Cuba Standard Time observes daylight saving time; Japan Standard Time does not. The offset between the two zones changes when Cuba Standard Time 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
- 4:27 AM
- Sunset
- 6:55 PM
- Day length
- 14h 28m
- Sunrise
- 6:44 AM
- Sunset
- 8:14 PM
- Day length
- 13h 30m
Cities in these zones
Cities in Japan Standard Time
Cities in Cuba Standard Time
Browse all cities to see the current local time anywhere.
Airports in these zones
Airports in Japan Standard Time
- HND
- NRT
- ITM
- KIX
- UKB
- NGO
- NKM
- CTS
- OKD
- FUK
Airports in Cuba Standard Time
- HAV
Related conversions
Common conversions
- What is 9:00 am JST in CST-CUBA?
- 9:00 am JST is 8:00 pm CST-CUBA, the previous day.
- What is 12:00 pm JST in CST-CUBA?
- 12:00 pm JST is 11:00 pm CST-CUBA, the previous day.
- What is 12:30 pm JST in CST-CUBA?
- 12:30 pm JST is 11:30 pm CST-CUBA, the previous day.
- What is 2:00 pm JST in CST-CUBA?
- 2:00 pm JST is 1:00 am CST-CUBA.
- What is 5:00 pm JST in CST-CUBA?
- 5:00 pm JST is 4:00 am CST-CUBA.
- What is 11:30 pm JST in CST-CUBA?
- 11:30 pm JST is 10:30 am CST-CUBA.