Tehran and Iran Time Zone Invitation from Michael W Smith
Iran Daylight saving Time | Wikipedia audio article
Time in Iran | Wikipedia audio article
Iran Standard Time (IRST) or Iran Time (IT) is the time zone used in Iran. Iran uses a UTC offset UTC+03:30. IRST is defined by the 52.5 degrees east meridian, the same meridian which defines the Iranian calendar and is the official meridian of Iran.