IST to CUB Time Converter

Convert India Standard Time (IST) to Cuba Standard Time (CUB). Both time zones are shown live below; current offset between them is 9h 30m behind.

Mumbai · India Standard Time
21:32:25
Wednesday, May 13, 2026
GMT+5:30 · UTC+05:30
Havana · Cuba Standard Time
12:02:25
Wednesday, May 13, 2026
GMT-4 · UTC-04:00

Convert a specific time

From: IST (Mumbai)
To: CUB (Havana)
--:--

Daylight Saving status right now

IST (India Standard Time)
Observes DST
No
CUB (Cuba Standard Time)
Observes DST
Yes
In DST right now
Yes
Next fall back
2026-11-01
Offset shift
UTC-04:00 → UTC-05:00

Heads up: CUB observes DST while IST does not. The 9.5-hour difference shown above will shift by one hour when CUB starts or ends DST.

When can IST and CUB meet?

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01
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IST
CUB
Both zones in working hours (9am-5pm)
One zone working
Off-hours
Columns are hours of the day in Mumbai (IST). Each row shows the local working-hours state in that zone for the same moment in time.
No overlap during strict 9-5 working hours; some flexibility needed.
If both sides are willing to extend to 8am-7pm, the available window is 18:00–18:00 IST (08:30–08:30 CUB).

Hour-by-hour IST to CUB conversion table

IST time (Mumbai)CUB time (Havana)Status
00:00 Wed14:30 TueCUB working
01:00 Wed15:30 TueCUB working
02:00 Wed16:30 TueCUB working
03:00 Wed17:30 TueOff-hours both sides
04:00 Wed18:30 TueOff-hours both sides
05:00 Wed19:30 TueOff-hours both sides
06:00 Wed20:30 TueOff-hours both sides
07:00 Wed21:30 TueOff-hours both sides
08:00 Wed22:30 TueOff-hours both sides
09:00 Wed23:30 TueIST working
10:00 Wed00:30 WedIST working
11:00 Wed01:30 WedIST working
12:00 Wed02:30 WedIST working
13:00 Wed03:30 WedIST working
14:00 Wed04:30 WedIST working
15:00 Wed05:30 WedIST working
16:00 Wed06:30 WedIST working
17:00 Wed07:30 WedOff-hours both sides
18:00 Wed08:30 WedOff-hours both sides
19:00 Wed09:30 WedCUB working
20:00 Wed10:30 WedCUB working
21:00 Wed11:30 WedCUB working
22:00 Wed12:30 WedCUB working
23:00 Wed13:30 WedCUB working

Times computed for today in each zone using the IANA time zone database. The conversion accounts for daylight saving time wherever applicable.

About these time zones

India Standard Time (IST)
IANA identifier
Asia/Kolkata
Current UTC offset
UTC+05:30
Current abbreviation
GMT+5:30
Major cities in this zone
MumbaiNew DelhiBangaloreChennaiKolkata
Cuba Standard Time (CUB)
IANA identifier
America/Havana
Current UTC offset
UTC-04:00
Current abbreviation
GMT-4
Major cities in this zone
Havana

Sun today in Mumbai and Havana

Mumbai
Sunrise
06:06
Sunset
19:06
Solar noon
12:36
Daylight
13h 0m

Related converters

CUB to IST (reverse)IST to ESTIST to PSTIST to GMTIST to UTCIST to CETEST to CUBPST to CUBGMT to CUBUTC to CUBCET to CUB
Looking for local time? See time in Mumbai or time in Havana.

Frequently asked questions

What is the time difference between IST and CUB right now?+
CUB (Cuba Standard Time) is currently 9h 30m behind IST (India Standard Time). The exact difference can change when one or both zones transition into or out of daylight saving time.
Does IST or CUB observe daylight saving time?+
IST: does not observe daylight saving time. CUB: observes daylight saving time.
When is the best time to schedule a meeting between IST and CUB?+
Standard 9-5 hours do not overlap. Extending to 8am-7pm gives a window of 18:00–18:00 IST (08:30–08:30 CUB).
What time is it in Havana when it is 12:00 noon in Mumbai?+
When it is 12:00 Wed in Mumbai (IST), it is 02:30 Wed in Havana (CUB).
Which IANA time zone identifiers are used for IST and CUB?+
IST maps to "Asia/Kolkata" in the IANA database. CUB maps to "America/Havana". These identifiers are what most software libraries use to convert times accurately, including DST handling.
Is Mumbai ahead of or behind Havana?+
Whether Mumbai (IST) is ahead of or behind Havana (CUB) depends on the current UTC offsets. Right now CUB is 9h 30m behind IST. The live converter and side-by-side clocks above always reflect the current direction.
What are the current UTC offsets for IST and CUB?+
IST is UTC+05:30 (GMT+5:30) and CUB is UTC-04:00 (GMT-4). Both offsets shift by one hour when the corresponding region enters or exits daylight saving time, so the live values on this page are the source of truth.
Can I schedule meetings during business hours for both IST and CUB?+
Not during a strict 9am-5pm window. If both sides flex to 8am-7pm, the available meeting window between IST and CUB is 18:00–18:00 IST.