app/views/calendar/_day.html.erb
<div class="<%= day[1]%>" data-day="<%= day[0].strftime('%d')%>" data-date="<%= day[0] %>" >
<%= day[0].strftime('%d')%>
<ul class="events_in_the_date">
<% day[2].each do |event|%>
<%= link_to calendar_event_path(event) do%>
<span class="label label-primary"><%= truncate(event.title,:length=> 15) %></span>
<% end%>
<% end %>
</ul>
</div>