If you want to convert Gregorian date to Jalali, here is collection of minimal solution for most programming languages.
c
php
datetime
date
iran
jalali-calendar
jalali
gregorian
gregorian-calendar
jalali-datetime
gregorian-converter
jalalidate
gregorian-calender
jalali-date
jalali-converter
gregorian-to-jalali
gregorian-to-persian
jalali-to-gregorian
gregoriantojalali
jalalitogregorian
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Updated
Jan 22, 2022 - C++