--- /usr/share/redmine/app/views/common/_calendar.html.erb	2012-06-18 23:23:44.000000000 +0300
+++ app/views/common/_calendar.html.erb	2013-09-08 00:40:01.627606290 +0300
@@ -16,6 +16,29 @@
   <%= link_to_issue i, :truncate => 30 %>
   <span class="tip"><%= render_issue_tooltip i %></span>
   </div>
+  <% elsif i.is_a? CustomValue %>
+    <% if i.customized.is_a? Issue %>
+      <div class="<%= i.customized.css_classes %> tooltip">
+        <span class="icon icon-time">
+          <%= h(i.custom_field.name) %>:
+          <%= h("#{i.customized.project} -") unless @project && @project == i.customized.project %>
+          <%= link_to_issue(i.customized, :subject => false) %>
+        </span>
+        <span class="tip"><%= render_issue_tooltip(i.customized) %></span>
+      </div>
+    <% elsif i.customized.is_a? Project %>
+      <span class="icon icon-time">
+        <%= h(i.custom_field.name) %><% unless @project && @project == i.customized %>:
+          <%= link_to_project(i.customized) %>
+        <% end %>
+      </span>
+    <% else %>
+      <span class="icon icon-time">
+        <%= h(i.custom_field.name) %>:
+        <%= h("#{i.customized.project} -") unless @project && @project == i.customized.project %>
+        <%= link_to_version(i.customized) %>
+      </span>
+    <% end %>
   <% else %>
   <span class="icon icon-package">
     <%= h("#{i.project} -") unless @project && @project == i.project %>