RET to GMT Time Converter

Convert Réunion Time (RET) to Greenwich Mean Time (GMT). Both time zones are shown live below; current offset between them is 3 hours behind.

Saint-Denis · Réunion Time
09:07:24
Wednesday, May 13, 2026
GMT+4 · UTC+04:00
London · Greenwich Mean Time
06:07:24
Wednesday, May 13, 2026
GMT+1 · UTC+01:00

Convert a specific time

From: RET (Saint-Denis)
To: GMT (London)
--:--

Daylight Saving status right now

RET (Réunion Time)
Observes DST
No
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

Heads up: GMT observes DST while RET does not. The 3-hour difference shown above will shift by one hour when GMT starts or ends DST.

When can RET 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
RET
GMT
Both zones in working hours (9am-5pm)
One zone working
Off-hours
Columns are hours of the day in Saint-Denis (RET). Each row shows the local working-hours state in that zone for the same moment in time.
5 hours of overlap during standard 9am-5pm working hours.
Best meeting window: 12:00–16:00 RET (09:00–13:00 GMT).

Hour-by-hour RET to GMT conversion table

RET time (Saint-Denis)GMT time (London)Status
00:00 Wed21:00 TueOff-hours both sides
01:00 Wed22:00 TueOff-hours both sides
02:00 Wed23:00 TueOff-hours both sides
03:00 Wed00:00 WedOff-hours both sides
04:00 Wed01:00 WedOff-hours both sides
05:00 Wed02:00 WedOff-hours both sides
06:00 Wed03:00 WedOff-hours both sides
07:00 Wed04:00 WedOff-hours both sides
08:00 Wed05:00 WedOff-hours both sides
09:00 Wed06:00 WedRET working
10:00 Wed07:00 WedRET working
11:00 Wed08:00 WedRET working
12:00 Wed09:00 WedBoth at work
13:00 Wed10:00 WedBoth at work
14:00 Wed11:00 WedBoth at work
15:00 Wed12:00 WedBoth at work
16:00 Wed13:00 WedBoth at work
17:00 Wed14:00 WedGMT working
18:00 Wed15:00 WedGMT working
19:00 Wed16:00 WedGMT working
20:00 Wed17:00 WedOff-hours both sides
21:00 Wed18:00 WedOff-hours both sides
22:00 Wed19:00 WedOff-hours both sides
23:00 Wed20:00 WedOff-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

Réunion Time (RET)
IANA identifier
Indian/Reunion
Current UTC offset
UTC+04:00
Current abbreviation
GMT+4
Major cities in this zone
Saint-Denis
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 Saint-Denis and London

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

Related converters

GMT to RET (reverse)RET to ESTRET to PSTRET to UTCRET to CETRET to ISTEST to GMTPST to GMTUTC to GMTCET to GMTIST to GMT
Looking for local time? See time in Saint-Denis or time in London.

Frequently asked questions

What is the time difference between RET and GMT right now?+
GMT (Greenwich Mean Time) is currently 3 hours behind RET (Réunion Time). The exact difference can change when one or both zones transition into or out of daylight saving time.
Does RET or GMT observe daylight saving time?+
RET: does not observe daylight saving time. GMT: observes daylight saving time.
When is the best time to schedule a meeting between RET and GMT?+
The strongest overlap is 12:00–16:00 RET (09:00–13:00 GMT), giving 5 hours when both sides are within standard 9am-5pm working hours.
What time is it in London when it is 12:00 noon in Saint-Denis?+
When it is 12:00 Wed in Saint-Denis (RET), it is 09:00 Wed in London (GMT).
Which IANA time zone identifiers are used for RET and GMT?+
RET maps to "Indian/Reunion" 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 Saint-Denis ahead of or behind London?+
Whether Saint-Denis (RET) is ahead of or behind London (GMT) depends on the current UTC offsets. Right now GMT is 3 hours behind RET. The live converter and side-by-side clocks above always reflect the current direction.
What are the current UTC offsets for RET and GMT?+
RET 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 RET and GMT?+
Yes. There are 5 hours of overlap during standard 9am-5pm working hours, with the strongest window at 12:00–16:00 RET.