Functions for working with Jalaali (Jalali, Persian, Khayyami, Khorshidi, Shamsi) calendar system.
Jalali calendar is a solar calendar that was used in Persia, variants of which today are still in use in Iran as well as Afghanistan. Read more on Wikipedia or see Calendar Converter.
Calendar conversion is based on the algorithm provided by Kazimierz M. Borkowski and has a very good performance.
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