CUB to IST Time Converter

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

Havana · Cuba Standard Time
04:05:24
Wednesday, May 13, 2026
GMT-4 · UTC-04:00
Mumbai · India Standard Time
13:35:24
Wednesday, May 13, 2026
GMT+5:30 · UTC+05:30

Convert a specific time

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

Daylight Saving status right now

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
IST (India Standard Time)
Observes DST
No

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 CUB and IST meet?

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01
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CUB
IST
Both zones in working hours (9am-5pm)
One zone working
Off-hours
Columns are hours of the day in Havana (CUB). 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 08:00–09:00 CUB (17:30–18:30 IST).

Hour-by-hour CUB to IST conversion table

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

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

Cuba Standard Time (CUB)
IANA identifier
America/Havana
Current UTC offset
UTC-04:00
Current abbreviation
GMT-4
Major cities in this zone
Havana
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

Sun today in Havana and Mumbai

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

Related converters

IST to CUB (reverse)CUB to ESTCUB to PSTCUB to GMTCUB to UTCCUB to CETEST to ISTPST to ISTGMT to ISTUTC to ISTCET to IST
Looking for local time? See time in Havana or time in Mumbai.

Frequently asked questions

What is the time difference between CUB and IST right now?+
IST (India Standard Time) is currently 9h 30m ahead CUB (Cuba Standard Time). The exact difference can change when one or both zones transition into or out of daylight saving time.
Does CUB or IST observe daylight saving time?+
CUB: observes daylight saving time. IST: does not observe daylight saving time.
When is the best time to schedule a meeting between CUB and IST?+
Standard 9-5 hours do not overlap. Extending to 8am-7pm gives a window of 08:00–09:00 CUB (17:30–18:30 IST).
What time is it in Mumbai when it is 12:00 noon in Havana?+
When it is 12:00 Wed in Havana (CUB), it is 21:30 Wed in Mumbai (IST).
Which IANA time zone identifiers are used for CUB and IST?+
CUB maps to "America/Havana" in the IANA database. IST maps to "Asia/Kolkata". These identifiers are what most software libraries use to convert times accurately, including DST handling.
Is Havana ahead of or behind Mumbai?+
Whether Havana (CUB) is ahead of or behind Mumbai (IST) depends on the current UTC offsets. Right now IST is 9h 30m ahead CUB. The live converter and side-by-side clocks above always reflect the current direction.
What are the current UTC offsets for CUB and IST?+
CUB is UTC-04:00 (GMT-4) and IST is UTC+05:30 (GMT+5:30). 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 CUB and IST?+
Not during a strict 9am-5pm window. If both sides flex to 8am-7pm, the available meeting window between CUB and IST is 08:00–09:00 CUB.