IRDT – Iran Daylight Time (Daylight Saving Time)
Also known as: IRST – Iran Summer Time, IDT – Iran Daylight Time
IRDT is currently not used at all
Asia: IRDT is currently not observed because locations are on standard time and are observing IRST.
Iran Daylight Time (IRDT) is 4:30 hours ahead of Coordinated Universal Time (UTC). This time zone is a DST (daylight saving time) time zone and is used in: Asia. Iran Daylight Time is a half-hour time zone. Its local time differs by 30 minutes from the usual one-hour time zone interval.
Winter Time & DST
This time zone is a daylight saving/summer time zone, in the winter some places will switch to the corresponding standard time zone: IRST (Iran Standard Time).
Email time zone indicator: +0430
An email sent from someone in the Iran Daylight Time (IRDT) time zone will have the time zone listed as "+0430" in the headers of the email. (However, "+0430" does not have to be in Iran Daylight Time, as other time zones could have the same UTC offset).
Where and when is IRDT observed?
Asian countries using IRDT in the summer and IRST in the winter
Other time zones in UTC +4:30
Some time zones exist that have the same offset as IRDT, but can be found under a different name:
Time zones by continent/region
- Central America
- Indian Ocean
- North America
- Other time standards
- South America
No locations currently on IRDT
Find current time and time zone by city
Iran – Tehran (Summer)
Related time zones
IRST – Iran Standard Time (Standard Time)