UTC time
IRST
Iran Standard Time
2 Aug 2026
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Frequently Asked Questions
What is IRST time now?
IRST time now is UTC+3:30 (Iran Standard Time)—no DST year-round.
Does this area observe DST?
Yes, Iran observes daylight saving time, transitioning to IRDT in the summer.
Which major cities follow this pattern?
Tehran, Isfahan, and other cities in Iran follow this schedule.
What areas share the same hours?
Afghanistan and parts of Pakistan share the same standard time.
How does this compare with UTC?
IRST is 3 hours and 30 minutes ahead of UTC during standard time and 4 hours and 30 minutes ahead when daylight saving time is in effect.
Why doesn't this area observe DST year-round?
Iran observes daylight saving time to make better use of daylight during the longer summer days, but IRST is used during the rest of the year to maintain consistency.
How did this system get established?
IRST was established as the standard time in Iran in 1940, and daylight saving time was later introduced in the 1970s to optimize energy use.
What are the typical work hours here?
Work hours typically run from 8:00 AM to 5:00 PM, with government offices often operating on different schedules.
What is the economic importance of this area?
Iran is a major player in energy production, particularly in oil and natural gas, and also has a strong industrial and agricultural base.