GMT to CRT Time Converter

Convert Greenwich Mean Time (GMT) to Costa Rica Time (CRT). Both time zones are shown live below; current offset between them is 7 hours behind.

London · Greenwich Mean Time
17:52:47
Tuesday, May 12, 2026
GMT+1 · UTC+01:00
San José · Costa Rica Time
10:52:47
Tuesday, May 12, 2026
CST · UTC-06:00

Convert a specific time

From: GMT (London)
To: CRT (San José)
--:--

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
CRT (Costa Rica Time)
Observes DST
No

Heads up: GMT observes DST while CRT does not. The 7-hour difference shown above will shift by one hour when GMT starts or ends DST.

When can GMT and CRT 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
CRT
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.
1 hour of overlap during standard 9am-5pm working hours.
Best meeting window: 16:00–16:00 GMT (09:00–09:00 CRT).

Hour-by-hour GMT to CRT conversion table

GMT time (London)CRT time (San José)Status
00:00 Tue17:00 MonOff-hours both sides
01:00 Tue18:00 MonOff-hours both sides
02:00 Tue19:00 MonOff-hours both sides
03:00 Tue20:00 MonOff-hours both sides
04:00 Tue21:00 MonOff-hours both sides
05:00 Tue22:00 MonOff-hours both sides
06:00 Tue23:00 MonOff-hours both sides
07:00 Tue00:00 TueOff-hours both sides
08:00 Tue01:00 TueOff-hours both sides
09:00 Tue02:00 TueGMT working
10:00 Tue03:00 TueGMT working
11:00 Tue04:00 TueGMT working
12:00 Tue05:00 TueGMT working
13:00 Tue06:00 TueGMT working
14:00 Tue07:00 TueGMT working
15:00 Tue08:00 TueGMT working
16:00 Tue09:00 TueBoth at work
17:00 Tue10:00 TueCRT working
18:00 Tue11:00 TueCRT working
19:00 Tue12:00 TueCRT working
20:00 Tue13:00 TueCRT working
21:00 Tue14:00 TueCRT working
22:00 Tue15:00 TueCRT working
23:00 Tue16:00 TueCRT 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

Greenwich Mean Time (GMT)
IANA identifier
Europe/London
Current UTC offset
UTC+01:00
Current abbreviation
GMT+1
Major cities in this zone
LondonManchesterEdinburghBirmingham
Costa Rica Time (CRT)
IANA identifier
America/Costa_Rica
Current UTC offset
UTC-06:00
Current abbreviation
CST
Major cities in this zone
San José

Sun today in London and San José

London
Sunrise
05:14
Sunset
20:41
Solar noon
12:58
Daylight
15h 26m

Related converters

CRT to GMT (reverse)GMT to ESTGMT to PSTGMT to UTCGMT to CETGMT to ISTEST to CRTPST to CRTUTC to CRTCET to CRTIST to CRT
Looking for local time? See time in London or time in San José.

Frequently asked questions

What is the time difference between GMT and CRT right now?+
CRT (Costa Rica Time) is currently 7 hours behind 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 CRT observe daylight saving time?+
GMT: observes daylight saving time. CRT: does not observe daylight saving time.
When is the best time to schedule a meeting between GMT and CRT?+
The strongest overlap is 16:00–16:00 GMT (09:00–09:00 CRT), giving 1 hour when both sides are within standard 9am-5pm working hours.
What time is it in San José when it is 12:00 noon in London?+
When it is 12:00 Tue in London (GMT), it is 05:00 Tue in San José (CRT).
Which IANA time zone identifiers are used for GMT and CRT?+
GMT maps to "Europe/London" in the IANA database. CRT maps to "America/Costa_Rica". These identifiers are what most software libraries use to convert times accurately, including DST handling.
Is London ahead of or behind San José?+
Whether London (GMT) is ahead of or behind San José (CRT) depends on the current UTC offsets. Right now CRT is 7 hours behind GMT. The live converter and side-by-side clocks above always reflect the current direction.
What are the current UTC offsets for GMT and CRT?+
GMT is UTC+01:00 (GMT+1) and CRT is UTC-06:00 (CST). 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 CRT?+
Yes. There are 1 hour of overlap during standard 9am-5pm working hours, with the strongest window at 16:00–16:00 GMT.