Medieval roots to Modern · Solar
Persian / Solar Hijri Calendar
The Solar Hijri year is anchored to the spring equinox and shares its era origin with the Hijri tradition while using a solar, not lunar, year.
What is the Persian / Solar Hijri Calendar?
The Solar Hijri year is anchored to the spring equinox and shares its era origin with the Hijri tradition while using a solar, not lunar, year.
How the calendar is structured
12 months; first six 31 days, next five 30 days, final month 29 or 30.
12 months; first six 31 days, next five 30 days, final month 29 or 30.
Where and why it is used
Region: Iran and Afghanistan. Primary context: Official civil calendar in Iran and Afghanistan.
History and development
The system belongs to the Medieval roots to Modern layer of the archive. Its origin is summarized as Modern official forms with older Iranian and Jalali roots. CalculatorWiser separates historical reconstruction, religious observance, civil use, and modern technical standards so different systems are not treated as though they all work the same way.
Visual reference gallery
Conversion and accuracy notes
Some calendar systems can be converted deterministically with modern algorithms. Others depend on observation, local authority, historical reconstruction, or regional practice. CalculatorWiser marks those distinctions rather than presenting uncertain dates as exact.
Research trail
This entry is part of the research-backed World Calendar Archive. Primary research anchor for this entry: Timeanddate / Persian calendar references.
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