@ajay gautam, if you are setting mindate date than you forcefully restricting to the datepicker
don't show the years before mindate() like wise so its not possible to scroll that time (this widget is behave like this )

if you want both min date as well as max date and scroller also
so you need to do customize your code remove the Min date and max date so scroller will work
and on change of that input do the validation for min and max date and check that in that
and in the year range (you will also able to give the range of years)
Thanks and Regards,
Akshay Deshpande