hay Man kinda got stuck, this is my calndar rendering code 

$(document).ready(function() {
  return $("#calendar").fullCalendar({
    header: {
      left: 'title',
      center: 'agendaDay,agendaWeek,month',
      right: 'today prev,next',
    },
    weekends: false,
    events: '/leave_events.json',
    dayRender: function( date, cell ) {
      if (moment().diff(date,'days') > 0){
        cell.css("background-color", "silver");
      }
    }
  });
});

and here is my json object builder

json.array!(@leave_events) do |leave_event|
  json.extract! leave_event, :id, :user_id, :team_id
  json.start leave_event.start_time
  json.end leave_event.end_time
end

still cant extract the count of events per day ... any tips