For Persian-speaking nations, Shamsi reinforces heritage without religious bias (unlike Hijri Qamari). It is a scientific calendar that predates and rivals the Gregorian system.
| Metric | Winner | |--------|--------| | Astronomical Accuracy | Shamsi | | Seasonal Consistency | Shamsi | | Ease of Conversion | Miladi | | Religious/Cultural Fit | Tie | | Historical Relevance | Miladi | | Digital Compatibility | Miladi | | Memorability | Shamsi | tarikh shamsi b miladi better
Overall: Miladi wins 3–3 (with one tie). But in the real world, where global trade, internet protocols, and flight schedules reign, Tarikh Miladi is the more “better” calendar for daily international life. Tarikh Shamsi remains the better calendar for living in sync with nature. | Feature | Tarikh Shamsi (Solar Hijri) |
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| Feature | Tarikh Shamsi (Solar Hijri) | Tarikh Miladi (Gregorian) | |--------|--------------------------------|-------------------------------| | Also known as | Persian calendar, Jalali calendar | Western calendar, Christian calendar | | Basis | Solar year (Earth's revolution around the Sun) | Solar year (tropical year) | | Start epoch | Hijra of Prophet Muhammad from Mecca to Medina (622 CE) | Birth of Jesus Christ (traditionally 1 CE) | | Current year (as of 2026) | 1405 SH (starts March 20–21, 2026) | 2026 CE | | Primary users | Iran, Afghanistan (officially); Tajikistan, Kurdish regions (culturally) | Most of the world (international standard for business, science, civil use) |
| Criteria | Tarikh Shamsi | Tarikh Miladi | |----------|---------------|----------------| | Year length error | 0.0000001 days (extremely precise) | 0.0003 days per year (1 day every 3,333 years) | | Alignment with equinox | Exact (based on actual equinox) | Approximate (average over leap cycle) |
Winner: Tarikh Shamsi. The Solar Hijri calendar is arguably the most accurate solar calendar in human history. It does not drift against seasons—Nowruz always marks the first day of spring. In contrast, the Gregorian calendar accumulates a 1-day drift every 3,333 years, requiring eventual correction.