Block indivisual date in pickadate.js

When i tried to block an array of individual dates, its not blocking but when i try using some date range i am able to block the dates.

Below mentioned code is working as i am passing blocked_dates.push({ from: [2020, 4-1, 17], to: [2020, 5-1, 17], inverted: true });

@foreach($available_dates_arr as $adate)
   available_dates.push({from:new Date(, -1, ), to:new Date(, -1, )});
@endforeach

blocked_dates.push({ from: [2020, 4-1, 17], to: [2020, 5-1, 17], inverted: true });
var $input = $('.datepicker').pickadate({
        disable: available_dates,
        min: min_date,
        selectMonths: true,
        selectYears: true,
        format: 'dd-mmm-yy'
    });
    picker = $input.pickadate('picker');

    if (blocked_dates && blocked_dates.length) {  
        picker.set('enable', blocked_dates);
    } 

But when i pass blocked_dates.push([2020, 4-1, 17, 'inverted']); its not blocking the dates.

Ref : pickadate.js

Thanks in advance :)

via Chebli Mohamed