WP Fluent Forms date field advanced date configuration for changing default datepicker date

fluent-forms-datepicker-default-date-configuration.js

/* Enter this configuration to Advanced Date Configuration of Date field. change 01/01/1950 to any date. the date is US format. */
{
  onOpen: [function(selectedDates, dateStr, instance){
    if (dateStr == '') {
      instance.jumpToDate('01/01/1950', false);
    }
  }],
  /* Set minimum age.(= 18) delete if you don't limit the age */
  maxDate: (new Date().getMonth() + 1) + "/" + new Date().getDate() + "/" + (new Date().getFullYear() - 18)
}