How To Change Gregorian Date Picker (Date Range Selector) To Jalali (Persian) Date?


I want to change cs-cart admin panel calendar to Jalali when language is set to FA (Persian/Farsi).

I have Gregorian to Jalali convertor function and I could change the date from Gregorian to Persian in both Storefront and admin panel. So, all dates are displayed in Jalali Format.

The problem is when I want to select (pick) a range of dates, Persian Calendar is shown but the dates are not converted to the right format. It still is using Gregorian date and time when I pick a date!

It seems that in admin panel only calendar's appearance is changed to Jalali not the date format!

Please guide me through proper way of changing date selector from Gregorian to Jalali in admin panel.