Iran Standard Time (IRST)

Iran Standard Time (IRST) operates at UTC+3:30 and is used across the entire Islamic Republic of Iran. Historically, the country switched to Iran Daylight Time (IRDT, UTC+4:30) during the summer, but this daylight saving practice was officially suspended in September 2022, making IRST the year-round standard. Sometimes simply called "Iran Time," IRST provides a consistent and recognizable time reference for the country.

Importance and Global Use of IRST

Iran Standard Time (IRST) is vital for synchronizing daily life, public administration, education, and industry across Iran's diverse regions. Its unique half-hour offset supports a distinctive national schedule, which is important for managing Iran's economic sectors such as oil, agriculture, and manufacturing, and for maintaining smooth public services.

Internationally, IRST plays a key role in coordinating trade, travel, and diplomacy with neighboring countries in the Middle East and South Asia. Its consistent UTC+3:30 offset since September 2022 has simplified time conversions for international business, telecommunications, and transport connections, helping Iran engage more reliably with global partners.

Where and When IRST is used worldwide