all dates start at Sunday

[ahtesham-clcbws]

Describe the bug
I am using ng2-flatpickr in angular9, when i select more-range, and showMonths-2, the dates are starting from sunday on all months.

i am using airbnb theme, but its not a theme issue, i already check with all theme in incognito mode.

This issue only shown when i use show than 1 month.

MY CODE in ts file
flatpickrOptions: FlatpickrOptions = {
mode: 'range',
minDate: 'today',
showMonths: 3,
};
MY CODE in html file
<ng2-flatpickr [config]="flatpickrOptions" placeholder="Check-In - Check-Out" formControlName="formControlName">

See screenshot for more information