i'm using odoo 8 for our team and we need to implement Jalali(Persian) calendar for our customers, we've added one module (Persian Calendar) that converts picked gregorian date to jalali, but in the UI we see Gregorian Calendar but in the input we see Persian date.

* This is the datePicker UI  

Image: https://i.stack.imgur.com/ZRwH7.png 

* This is selected date (Persian)  

Image: https://i.stack.imgur.com/MeT9h.png