Solar Higri Calendar
The Solar Hijri calendar is the official calendar of Iran and Afghanistan .It is only used in Iran and Afghanistan . It begins on the March equinox (Nowruz) at the Iranian standard meridian (52.5°E, UTC+03:30) and has years of 365 or 366 days. It is abbreviated as SH. It is also called the Solar Hejri calendar and (Persian: گاهشماری هجری خورشیدی, romanized: gāh-shomāri-ye hejri-ye khorshidi; Pashto: لمريز لېږدیز کلیز),
Each of the twelve months corresponds with a zodiac sign. The first six months have 31 days, the next five have 30 days, and the last month has 29 days in usual years but 30 days in leap years. The New Year's Day always falls on the March equinox.