Index: app/views/gantts/show.html.erb
===================================================================
--- app/views/gantts/show.html.erb	(revision 13182)
+++ app/views/gantts/show.html.erb	(working copy)
@@ -90,6 +90,7 @@
   headers_height = header_height
   show_weeks = false
   show_days  = false
+  show_day_num = false
 
   if @gantt.zoom > 1
     show_weeks = true
@@ -97,6 +98,10 @@
     if @gantt.zoom > 2
         show_days = true
         headers_height = 3 * header_height
+        if @gantt.zoom > 3
+          show_day_num = true
+          headers_height = 4 * header_height
+        end
     end
   end
 
@@ -231,11 +236,35 @@
   <% end %>
 <% end %>
 
+<%
+#
+# Days headers Num
+#
+if show_day_num
+  left = 0
+  height = g_height + header_height*2 - 1
+  wday = @gantt.date_from.cwday
+  day_num = @gantt.date_from
+  (@gantt.date_to - @gantt.date_from + 1).to_i.times do
+  width =  zoom - 1 
+%>
+  <div style="left:<%= left %>px;top:37px;width:<%= width %>px;height:<%= height %>px;font-size:0.7em;<%= "background:#f1f1f1;" if wday > 5 %><%= "color:blue;" if wday == 6 %><%= "color:red;" if wday == 7 %>" class="gantt_hdr">
+  <%= day_num.day %>
+  </div>
+  <%
+   left = left + width+1
+   day_num = day_num + 1
+   wday = wday + 1
+   wday = 1 if wday > 7
+   end
+end %> 
+
 <% ###### Days headers ####### %>
 <% if show_days %>
   <%
     left = 0
     height = g_height + header_height - 1
+    top = (show_day_num ? 55 : 37)
     wday = @gantt.date_from.cwday
   %>
   <% (@gantt.date_to - @gantt.date_from + 1).to_i.times do %>
@@ -243,7 +272,7 @@
       width =  zoom - 1
       style  = ""
       style += "left: #{left}px;"
-      style += "top:37px;"
+      style += "top: #{top}px;"
       style += "width: #{width}px;"
       style += "height: #{height}px;"
       style += "font-size:0.7em;"