On Scrolling week Next week should start from Sunday

I was using this library to use the Calendar strip. I want to start my week from sunday which I achieved but when I scroll into past or future week it reflects Monday to sunday instead of Sunday-Saturday, It takes a while and after that it reflects in sunday-saturday which seems like a glitch in the application.
So is there any way in which we can set the starting week as sunday for all the weeks. If user scrolls in past or future the initial week day will be sunday