IST to Havana time conversion
Havana is 9 hours 30 minutes behind IST. After the next clock change (): Havana is 10 hours 30 minutes behind IST.
Time difference with your location
IST is 5 hours 30 minutes ahead of UTC. Compare with your local time →
Choose a date and time
Choose the local time in IST to convert it to Havana on that date.
Skipped clock-change times are unavailable; a repeated time uses its first occurrence.
24-hour conversion chart · IST → Havana
This table converts each hour in IST to Havana on 2026-10-21.
- Working hours
- Outside working hours
- Night hours
| IST | Havana | Shared working hours |
|---|---|---|
| 00:0012:00 AM | 14:302:30 PM -1 day | |
| 01:001:00 AM | 15:303:30 PM -1 day | |
| 02:002:00 AM | 16:304:30 PM -1 day | |
| 03:003:00 AM | 17:305:30 PM -1 day | |
| 04:004:00 AM | 18:306:30 PM -1 day | |
| 05:005:00 AM | 19:307:30 PM -1 day | |
| 06:006:00 AM | 20:308:30 PM -1 day | |
| 07:007:00 AM | 21:309:30 PM -1 day | |
| 08:008:00 AM | 22:3010:30 PM -1 day | |
| 09:009:00 AM | 23:3011:30 PM -1 day | |
| 10:0010:00 AM | 00:3012:30 AM | |
| 11:0011:00 AM | 01:301:30 AM | |
| 12:0012:00 PM | 02:302:30 AM | |
| 13:001:00 PM | 03:303:30 AM | |
| 14:002:00 PM | 04:304:30 AM | |
| 15:003:00 PM | 05:305:30 AM | |
| 16:004:00 PM | 06:306:30 AM | |
| 17:005:00 PM | 07:307:30 AM | |
| 18:006:00 PM | 08:308:30 AM | |
| 19:007:00 PM | 09:309:30 AM | |
| 20:008:00 PM | 10:3010:30 AM | |
| 21:009:00 PM | 11:3011:30 AM | |
| 22:0010:00 PM | 12:3012:30 PM | |
| 23:0011:00 PM | 13:301:30 PM |
Quick conversion examples
These examples use IST (UTC+5:30) and Havana (UTC-4); choosing a date applies the local clock changes.
Conversion formula: Havana = IST − 9h30 · IST − 10h30.
| IST | Havana |
|---|---|
| 6:00 AM IST | = 8:30 PM Havana (-1 day) |
| 7:00 AM IST | = 9:30 PM Havana (-1 day) |
| 8:00 AM IST | = 10:30 PM Havana (-1 day) |
| 9:00 AM IST | = 11:30 PM Havana (-1 day) |
| 10:00 AM IST | = 12:30 AM Havana |
| 12:00 PM IST | = 2:30 AM Havana |
| 3:00 PM IST | = 5:30 AM Havana |
| 5:00 PM IST | = 7:30 AM Havana |
| 6:00 PM IST | = 8:30 AM Havana |
| 8:00 PM IST | = 10:30 AM Havana |
Overlapping meeting hours
The 08:00–18:00 working day in IST and Havana overlaps for 30 minutes on 2026-10-21.
- Shared working hours
- 17:30–18:00 IST · 08:00–08:30 Havana
Clock changes on both sides, 2026–2028
IST and Havana have the following local clock changes in 2026–2028; all times in the table are local to that side.
| Year | IST | Havana |
|---|---|---|
| 2026 | No clock changes; UTC+5:30 all year. | · 00:00 → 01:00 · 01:00 → 00:00 |
| 2027 | No clock changes; UTC+5:30 all year. | · 00:00 → 01:00 · 01:00 → 00:00 |
| 2028 | No clock changes; UTC+5:30 all year. | · 00:00 → 01:00 · 01:00 → 00:00 |
At the start of 2026, Havana is 10 hours 30 minutes behind IST. The difference changes during the following periods.
- From 2026-03-08 10:30 IST until 2026-11-01 10:30 IST, Havana is 9 hours 30 minutes behind IST.
- From 2027-03-14 10:30 IST until 2027-11-07 10:30 IST, Havana is 9 hours 30 minutes behind IST.
- From 2028-03-12 10:30 IST until 2028-11-05 10:30 IST, Havana is 9 hours 30 minutes behind IST.
Frequently asked questions
What time is 9 AM IST in Havana?
9:00 AM IST = 11:30 PM Havana (-1 day), using UTC+5:30 and UTC-4. Choose a date above for the seasonal local time.
Does the time difference between IST and Havana change during the year?
Yes. During 2026–2028: Havana is 10 hours 30 minutes behind IST; Havana is 9 hours 30 minutes behind IST. The clock-change table gives the dates for both sides.
How do I tell whether it is day or night in Havana?
Read the Havana clock above: this guide counts 06:00–18:00 local time as daytime and the rest as nighttime, without using sunrise and sunset.
What is the best time to call between IST and Havana?
The shared 08:00–18:00 working window is 17:30–18:00 IST / 08:00–08:30 Havana, a total of 30 minutes.
What is the time difference between IST and Havana now?
Right now, Havana is 9 hours 30 minutes behind IST. Conversion formula: Havana = IST − 9h30 · IST − 10h30.