CUB to GMT Time Converter

Convert Cuba Standard Time (CUB) to Greenwich Mean Time (GMT). Both time zones are shown live below; current offset between them is 5 hours ahead.

Havana · Cuba Standard Time
10:35:21
Wednesday, May 13, 2026
GMT-4 · UTC-04:00
London · Greenwich Mean Time
15:35:21
Wednesday, May 13, 2026
GMT+1 · UTC+01:00

Convert a specific time

From: CUB (Havana)
To: GMT (London)
--:--

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
GMT (Greenwich Mean Time)
Observes DST
Yes
In DST right now
Yes
Next fall back
2026-10-25
Offset shift
UTC+01:00 → UTC+00:00

When can CUB and GMT meet?

00
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
17
18
19
20
21
22
23
CUB
GMT
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.
3 hours of overlap during standard 9am-5pm working hours.
Best meeting window: 09:00–11:00 CUB (14:00–16:00 GMT).

Hour-by-hour CUB to GMT conversion table

CUB time (Havana)GMT time (London)Status
00:00 Wed05:00 WedOff-hours both sides
01:00 Wed06:00 WedOff-hours both sides
02:00 Wed07:00 WedOff-hours both sides
03:00 Wed08:00 WedOff-hours both sides
04:00 Wed09:00 WedGMT working
05:00 Wed10:00 WedGMT working
06:00 Wed11:00 WedGMT working
07:00 Wed12:00 WedGMT working
08:00 Wed13:00 WedGMT working
09:00 Wed14:00 WedBoth at work
10:00 Wed15:00 WedBoth at work
11:00 Wed16:00 WedBoth at work
12:00 Wed17:00 WedCUB working
13:00 Wed18:00 WedCUB working
14:00 Wed19:00 WedCUB working
15:00 Wed20:00 WedCUB working
16:00 Wed21:00 WedCUB working
17:00 Wed22:00 WedOff-hours both sides
18:00 Wed23:00 WedOff-hours both sides
19:00 Wed00:00 ThuOff-hours both sides
20:00 Wed01:00 ThuOff-hours both sides
21:00 Wed02:00 ThuOff-hours both sides
22:00 Wed03:00 ThuOff-hours both sides
23:00 Wed04:00 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
Greenwich Mean Time (GMT)
IANA identifier
Europe/London
Current UTC offset
UTC+01:00
Current abbreviation
GMT+1
Major cities in this zone
LondonManchesterEdinburghBirmingham

Sun today in Havana and London

London
Sunrise
05:13
Sunset
20:43
Solar noon
12:58
Daylight
15h 29m

Related converters

GMT to CUB (reverse)CUB to ESTCUB to PSTCUB to UTCCUB to CETCUB to ISTEST to GMTPST to GMTUTC to GMTCET to GMTIST to GMT
Looking for local time? See time in Havana or time in London.

Frequently asked questions

What is the time difference between CUB and GMT right now?+
GMT (Greenwich Mean Time) is currently 5 hours 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 GMT observe daylight saving time?+
CUB: observes daylight saving time. GMT: observes daylight saving time.
When is the best time to schedule a meeting between CUB and GMT?+
The strongest overlap is 09:00–11:00 CUB (14:00–16:00 GMT), giving 3 hours when both sides are within standard 9am-5pm working hours.
What time is it in London when it is 12:00 noon in Havana?+
When it is 12:00 Wed in Havana (CUB), it is 17:00 Wed in London (GMT).
Which IANA time zone identifiers are used for CUB and GMT?+
CUB maps to "America/Havana" in the IANA database. GMT maps to "Europe/London". These identifiers are what most software libraries use to convert times accurately, including DST handling.
Is Havana ahead of or behind London?+
Whether Havana (CUB) is ahead of or behind London (GMT) depends on the current UTC offsets. Right now GMT is 5 hours 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 GMT?+
CUB is UTC-04:00 (GMT-4) and GMT is UTC+01:00 (GMT+1). 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 GMT?+
Yes. There are 3 hours of overlap during standard 9am-5pm working hours, with the strongest window at 09:00–11:00 CUB.