IRT to GFT Time Converter

Convert Iran Standard Time (IRT) to French Guiana Time (GFT). Both time zones are shown live below; current offset between them is 6h 30m behind.

Tehran · Iran Standard Time
07:44:43
Sunday, May 24, 2026
GMT+3:30 · UTC+03:30
Cayenne · French Guiana Time
01:14:43
Sunday, May 24, 2026
GMT-3 · UTC-03:00

Convert a specific time

From: IRT (Tehran)
To: GFT (Cayenne)
--:--

Daylight Saving status right now

IRT (Iran Standard Time)
Observes DST
No
GFT (French Guiana Time)
Observes DST
No

When can IRT and GFT meet?

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IRT
GFT
Both zones in working hours (9am-5pm)
One zone working
Off-hours
Columns are hours of the day in Tehran (IRT). 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 IRT (09:30–09:30 GFT).

Hour-by-hour IRT to GFT conversion table

IRT time (Tehran)GFT time (Cayenne)Status
00:00 Sun17:30 SatOff-hours both sides
01:00 Sun18:30 SatOff-hours both sides
02:00 Sun19:30 SatOff-hours both sides
03:00 Sun20:30 SatOff-hours both sides
04:00 Sun21:30 SatOff-hours both sides
05:00 Sun22:30 SatOff-hours both sides
06:00 Sun23:30 SatOff-hours both sides
07:00 Sun00:30 SunOff-hours both sides
08:00 Sun01:30 SunOff-hours both sides
09:00 Sun02:30 SunIRT working
10:00 Sun03:30 SunIRT working
11:00 Sun04:30 SunIRT working
12:00 Sun05:30 SunIRT working
13:00 Sun06:30 SunIRT working
14:00 Sun07:30 SunIRT working
15:00 Sun08:30 SunIRT working
16:00 Sun09:30 SunBoth at work
17:00 Sun10:30 SunGFT working
18:00 Sun11:30 SunGFT working
19:00 Sun12:30 SunGFT working
20:00 Sun13:30 SunGFT working
21:00 Sun14:30 SunGFT working
22:00 Sun15:30 SunGFT working
23:00 Sun16:30 SunGFT 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

Iran Standard Time (IRT)
IANA identifier
Asia/Tehran
Current UTC offset
UTC+03:30
Current abbreviation
GMT+3:30
Major cities in this zone
TehranIsfahan
French Guiana Time (GFT)
IANA identifier
America/Cayenne
Current UTC offset
UTC-03:00
Current abbreviation
GMT-3
Major cities in this zone
Cayenne

Sun today in Tehran and Cayenne

Tehran
Sunrise
04:55
Sunset
19:10
Solar noon
12:02
Daylight
14h 15m

Related converters

GFT to IRT (reverse)IRT to ESTIRT to PSTIRT to GMTIRT to UTCIRT to CETEST to GFTPST to GFTGMT to GFTUTC to GFTCET to GFT
Looking for local time? See time in Tehran or time in Cayenne.

Frequently asked questions

What is the time difference between IRT and GFT right now?+
GFT (French Guiana Time) is currently 6h 30m behind IRT (Iran Standard Time). The exact difference can change when one or both zones transition into or out of daylight saving time.
Does IRT or GFT observe daylight saving time?+
IRT: does not observe daylight saving time. GFT: does not observe daylight saving time.
When is the best time to schedule a meeting between IRT and GFT?+
The strongest overlap is 16:00–16:00 IRT (09:30–09:30 GFT), giving 1 hour when both sides are within standard 9am-5pm working hours.
What time is it in Cayenne when it is 12:00 noon in Tehran?+
When it is 12:00 Sun in Tehran (IRT), it is 05:30 Sun in Cayenne (GFT).
Which IANA time zone identifiers are used for IRT and GFT?+
IRT maps to "Asia/Tehran" in the IANA database. GFT maps to "America/Cayenne". These identifiers are what most software libraries use to convert times accurately, including DST handling.
Is Tehran ahead of or behind Cayenne?+
Whether Tehran (IRT) is ahead of or behind Cayenne (GFT) depends on the current UTC offsets. Right now GFT is 6h 30m behind IRT. The live converter and side-by-side clocks above always reflect the current direction.
What are the current UTC offsets for IRT and GFT?+
IRT is UTC+03:30 (GMT+3:30) and GFT is UTC-03:00 (GMT-3). 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 IRT and GFT?+
Yes. There are 1 hour of overlap during standard 9am-5pm working hours, with the strongest window at 16:00–16:00 IRT.