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PrimeCalendar provides all java.util.Calendar functionalities for Persian and Hijri dates. PrimeCalendar can be used in every JVM-based projects such as Java/kotlin applications, Android apps, etc.

This library contains three types of calendar systems as well as their conversion to each other.

Easy way to put classes in main dex.

A night model lib to change app's night theme easy. You do not need to restart Activity.