Iran Standard Time

Iran Standard Time (IRST), also called Iran Time (IRT), is a time zone used in Iran. The standard time is 3.5 hours ahead of Coordinated Universal Time (). During its daylight saving time (DST), it used Iran Daylight Time (IRDT), which was 4.5 hours ahead of Coordinated Universal Time (), but however, from 2006 to 2007, IRDT was not used in Iran, but was re-introduced on March 21, 2008. On September 21, 2022, Iran abolished daylight saving time and now observes standard time the entire year.
Daylight saving dates for Iran.
Before it was ended in 2022, daylight saving time (DST) started on March 21 or 22 (Farvardin) and ended on September 21-22 (Shahrivar).