jalali calendar for YITH Event Tickets for WooCommerce plugin

recently, I am using YITH Event Tickets for WooCommerce for a customer. The problem is my WordPress calendar is Jalali calendar (the WordPress language is Also Persian) but the plugin uses Gregorian calendar in the backend and admin panel, so when I set the date in Jalali type (like : 1400-10-05) every event would be set for 600 years Ago. How can I use the Jalali calendar for the backend?

Thanks in advance.

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