https://fomantic-ui.com/modules/calendar.html#enable-only-specific-dates

The example for Calendar "Enable only specific Dates" does not work. When you click the calendar, the enabled dates are disabled. There should be 3 selectable dates.

enabledDates: [ new Date('2019-03-05'), new Date('2019-03-10'), new Date('2019-03-20') ]