GMT to BTT Time Converter

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

London · Greenwich Mean Time
15:35:11
Wednesday, May 13, 2026
GMT+1 · UTC+01:00
Thimphu · Bhutan Time
20:35:11
Wednesday, May 13, 2026
GMT+6 · UTC+06:00

Convert a specific time

From: GMT (London)
To: BTT (Thimphu)
--:--

Daylight Saving status right now

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
BTT (Bhutan Time)
Observes DST
No

Heads up: GMT observes DST while BTT does not. The 5-hour difference shown above will shift by one hour when GMT starts or ends DST.

When can GMT and BTT 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
GMT
BTT
Both zones in working hours (9am-5pm)
One zone working
Off-hours
Columns are hours of the day in London (GMT). 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 GMT (14:00–16:00 BTT).

Hour-by-hour GMT to BTT conversion table

GMT time (London)BTT time (Thimphu)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 WedBTT working
05:00 Wed10:00 WedBTT working
06:00 Wed11:00 WedBTT working
07:00 Wed12:00 WedBTT working
08:00 Wed13:00 WedBTT 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 WedGMT working
13:00 Wed18:00 WedGMT working
14:00 Wed19:00 WedGMT working
15:00 Wed20:00 WedGMT working
16:00 Wed21:00 WedGMT 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

Greenwich Mean Time (GMT)
IANA identifier
Europe/London
Current UTC offset
UTC+01:00
Current abbreviation
GMT+1
Major cities in this zone
LondonManchesterEdinburghBirmingham
Bhutan Time (BTT)
IANA identifier
Asia/Thimphu
Current UTC offset
UTC+06:00
Current abbreviation
GMT+6
Major cities in this zone
Thimphu

Sun today in London and Thimphu

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

Related converters

BTT to GMT (reverse)GMT to ESTGMT to PSTGMT to UTCGMT to CETGMT to ISTEST to BTTPST to BTTUTC to BTTCET to BTTIST to BTT
Looking for local time? See time in London or time in Thimphu.

Frequently asked questions

What is the time difference between GMT and BTT right now?+
BTT (Bhutan Time) is currently 5 hours ahead GMT (Greenwich Mean Time). The exact difference can change when one or both zones transition into or out of daylight saving time.
Does GMT or BTT observe daylight saving time?+
GMT: observes daylight saving time. BTT: does not observe daylight saving time.
When is the best time to schedule a meeting between GMT and BTT?+
The strongest overlap is 09:00–11:00 GMT (14:00–16:00 BTT), giving 3 hours when both sides are within standard 9am-5pm working hours.
What time is it in Thimphu when it is 12:00 noon in London?+
When it is 12:00 Wed in London (GMT), it is 17:00 Wed in Thimphu (BTT).
Which IANA time zone identifiers are used for GMT and BTT?+
GMT maps to "Europe/London" in the IANA database. BTT maps to "Asia/Thimphu". These identifiers are what most software libraries use to convert times accurately, including DST handling.
Is London ahead of or behind Thimphu?+
Whether London (GMT) is ahead of or behind Thimphu (BTT) depends on the current UTC offsets. Right now BTT is 5 hours ahead GMT. The live converter and side-by-side clocks above always reflect the current direction.
What are the current UTC offsets for GMT and BTT?+
GMT is UTC+01:00 (GMT+1) and BTT is UTC+06:00 (GMT+6). 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 GMT and BTT?+
Yes. There are 3 hours of overlap during standard 9am-5pm working hours, with the strongest window at 09:00–11:00 GMT.