Fullcalendar: Change the color for specific days

Question

I\'m stuck with a project I get at work. I need to change the background color of some days. It\'s a calendar where the user should see, which days are available and which n

Answer 1

    dayRender: function(date, cell){
        if (moment().diff(date,'days') > 0){
            cell.css("background-color","silver");
        }
    },