Expected behavior Show Dates as M/D/YYYY

Actual behavior Dates appear as DD/MM/YYYY

Resources (screenshots, code snippets etc.) I tried to change the formats in this code so dates in the tooltips and the date picker appear as M/D/YYY, but when changed, the calendar won't load properly. What is the correct way to change how dates are displayed?

this.formats = {
      date: 'DD/MM/YYYY',
      dateTime: this.options.twelveHour ? 'DD/MM/YYYY hh:mm A' : 'DD/MM/YYYY HH:mm',
      time: this.options.twelveHour ? 'hh:mm A' : 'HH:mm',
    };