This is the module for CalendarDate and CalendarDateTime in the Persian (Solar Hijri) calendar, the official calendar of Iran and Afghanistan. It is a solar calendar whose year begins at the vernal equinox and whose leap years are among the most accurate of any calendar; they can be found from a simple 33-year cycle, from Birashk's nested arithmetic cycles, or from astronomical calculation of the equinox.

Note: this calendar is not yet implemented.