Smart Persian Calendar is a free, fast, and easy-to-use app that shows the Persian (Jalali), Gregorian, and Hijri (Islamic lunar) dates side by side, along with daily national, religious, and international observances.

Key features:

• Persian calendar with Gregorian and Hijri equivalents for every day
  

• National, religious, and international holidays and events
  

• Convert dates between Jalali, Gregorian, and Hijri calendars
  

• Accurate prayer times (Fajr, Noon, Maghrib, Isha) based on your location
  

• Precise age calculator (years, months, days) with countdown to next birthday
  

• Light and dark theme support
  

• Fully offline after first visit