reactjs datepicker date format

React datepicker uses Moment.js for dates, I think you should review the docs at his website.

For example MMMM Do YYYY, h:mm:ss a should return a date formated as March 21st 2019, 8:50:37 am.

EDIT

I went to the repo and it appears the author removed moment from package, so I gave a try to the formatting dates guide found here and it appears to be working now! Per example use "eeee" if you want day of the week.

I made a working example at codesandbox.