Solar Hijri Calendar

The Solar Hijri calendar, also called the Persian or Iranian solar calendar, is the solar reckoning recorded here as its own calendar, distinct from the lunar Islamic Hijri calendar. Wikipedia says it is the official calendar of Iran and the most widely used calendar in Afghanistan, and that each year begins on the day of the March equinox. It is recorded as its own calendar entity so that the holidays and festivals reckoned by it can be grouped and compared in one place, while each holiday entry keeps its own dating facts and sources.