GMT+03:30 is an identifier for a time offset from UTC of +03:30.

In ISO 8601 the associated time would be written as 2025-02-23T12:01:05+03:30.

This time is used only in Iran, so it is also called Iran Standard Time.

[1] By adnational April 2021 Principal cities: Tehran, Mashhad, Isfahan, Karaj, Shiraz, Tabriz, Qom, Ahvaz