Operation of a particular day of the month

[montero lalas]

This function is understandable:

    onDayClick: function(events) {
      alert('hey!');         
    },

but it works with every click should look like this feature to assign the click of only one designated day

[montero lalas]

I find:

          onActiveDayClick: function(events) {
              alert('Active click');
          },