IRST is currently not observed because of applying DST. See Iran Daylight Time instead.
IRST will be observed after Wednesday 22 September 2021, 00:00
IRST (Iran Standard Time) is one of the well-known names of UTC+3:30 time zone which is 3:30h. ahead of UTC (Coordinated Universal Time).The time offset from UTC can be written as +03:30.
It's used during the winter. During the summer IRDT - Iran Daylight Time (UTC+4:30) is in use.
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