GFT to IRT Time Converter

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

Cayenne · French Guiana Time
02:24:02
Sunday, May 17, 2026
GMT-3 · UTC-03:00
Tehran · Iran Standard Time
08:54:02
Sunday, May 17, 2026
GMT+3:30 · UTC+03:30

Convert a specific time

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

Daylight Saving status right now

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

When can GFT and IRT meet?

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01
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09
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GFT
IRT
Both zones in working hours (9am-5pm)
One zone working
Off-hours
Columns are hours of the day in Cayenne (GFT). Each row shows the local working-hours state in that zone for the same moment in time.
2 hours of overlap during standard 9am-5pm working hours.
Best meeting window: 09:00–10:00 GFT (15:30–16:30 IRT).

Hour-by-hour GFT to IRT conversion table

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

French Guiana Time (GFT)
IANA identifier
America/Cayenne
Current UTC offset
UTC-03:00
Current abbreviation
GMT-3
Major cities in this zone
Cayenne
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

Sun today in Cayenne and Tehran

Tehran
Sunrise
04:59
Sunset
19:04
Solar noon
12:02
Daylight
14h 5m

Related converters

IRT to GFT (reverse)GFT to ESTGFT to PSTGFT to GMTGFT to UTCGFT to CETEST to IRTPST to IRTGMT to IRTUTC to IRTCET to IRT
Looking for local time? See time in Cayenne or time in Tehran.

Frequently asked questions

What is the time difference between GFT and IRT right now?+
IRT (Iran Standard Time) is currently 6h 30m ahead GFT (French Guiana Time). The exact difference can change when one or both zones transition into or out of daylight saving time.
Does GFT or IRT observe daylight saving time?+
GFT: does not observe daylight saving time. IRT: does not observe daylight saving time.
When is the best time to schedule a meeting between GFT and IRT?+
The strongest overlap is 09:00–10:00 GFT (15:30–16:30 IRT), giving 2 hours when both sides are within standard 9am-5pm working hours.
What time is it in Tehran when it is 12:00 noon in Cayenne?+
When it is 12:00 Sun in Cayenne (GFT), it is 18:30 Sun in Tehran (IRT).
Which IANA time zone identifiers are used for GFT and IRT?+
GFT maps to "America/Cayenne" in the IANA database. IRT maps to "Asia/Tehran". These identifiers are what most software libraries use to convert times accurately, including DST handling.
Is Cayenne ahead of or behind Tehran?+
Whether Cayenne (GFT) is ahead of or behind Tehran (IRT) depends on the current UTC offsets. Right now IRT is 6h 30m ahead GFT. The live converter and side-by-side clocks above always reflect the current direction.
What are the current UTC offsets for GFT and IRT?+
GFT is UTC-03:00 (GMT-3) and IRT is UTC+03:30 (GMT+3:30). 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 GFT and IRT?+
Yes. There are 2 hours of overlap during standard 9am-5pm working hours, with the strongest window at 09:00–10:00 GFT.