Wrong days - today is Thursday, not Friday

[Asphiii]

Today(16.04.2020) we have thurdsay, not friday

[ElionTDA]

I think, ur fail is the array of traductions:
weekdays : ['Sunday','Monday','Tuesday','Wednesday','Thursday','Friday','Saturday'],

You must to start on Sunday, and determine the first day with:
firstDay: 1, // If your first week day is Monday.
I hope it help u.