diff --git a/app/controllers/application_controller.rb b/app/controllers/application_controller.rb
index 58097ec..e36543b 100755
--- a/app/controllers/application_controller.rb
+++ b/app/controllers/application_controller.rb
@@ -37,24 +37,20 @@
     end 
     
   end 
-  
-
-def get_theme
-
-#  if params[:theme]== "default" || params[:theme]=="2003" || params[:theme].nil?
-#    params[:theme]="blue1"
-#    end
-  if ThemesForRails.available_theme_names.include?(params[:theme]) and can? :showintern,Thema
-    params[:theme]
+  def get_theme
+u=current_user
+ if ! u.try(:preferredtheme).nil? and ThemesForRails.available_theme_names.include?(u.preferredtheme) 
+      u.preferredtheme
   else
     "blue1"
   end
-end
+
+  end
 
 def current_ability
  @current_ability ||= Ability.new(current_user, request)
 end
   def default_url_options
-    {locale: I18n.locale, theme: (theme_name=="blue1") ? nil : theme_name , ansicht: nil}
+    {locale: I18n.locale, theme: nil , ansicht: nil}
   end
 end
diff --git a/app/helpers/application_helper.rb b/app/helpers/application_helper.rb
index 1bfe832..7a1f425 100755
--- a/app/helpers/application_helper.rb
+++ b/app/helpers/application_helper.rb
@@ -113,4 +113,17 @@ m.save
     url.path=path
     return url
   end
+
+  def get_theme_help(u)
+
+#  if params[:theme]== "default" || params[:theme]=="2003" || params[:theme].nil?
+#    params[:theme]="blue1"
+#    end
+    if ! u.try(:preferredtheme).nil? and ThemesForRails.available_theme_names.include?(u.preferredtheme) 
+      u.preferredtheme
+  else
+    "blue1"
+  end
+end
+
 end
diff --git a/app/views/layouts/application.html.erb b/app/views/layouts/application.html.erb
index 8993188..52b01f4 100755
--- a/app/views/layouts/application.html.erb
+++ b/app/views/layouts/application.html.erb
@@ -28,7 +28,7 @@
     <div id="maincontainer" class="container-fluid">
       <div class="row-fluid">
 	<div class="span10 offset1 header_span">
-	  <% cache("menu_u"+user_signed_in?.to_s+current_user.try(:id).to_s+"l"+I18n.locale.to_s+ can?(:seeintern, User).to_s+ can?(:index,Gallery).to_s, expires_in: 24.hours) do %>
+	  <% cache("menu_u"+user_signed_in?.to_s+current_user.try(:id).to_s+"l"+I18n.locale.to_s+ can?(:seeintern, User).to_s+ can?(:index,Gallery).to_s+params[:theme].to_s, expires_in: 24.hours) do %>
 	  <div class="header_wrap">
 	    <div class="header hidden-print">
 	      <%= link_to home_index_path do %>
diff --git a/app/views/themes/blue1/home/index.html.erb b/app/views/themes/blue1/home/index.html.erb
index 481b871..c62a6ea 100644
--- a/app/views/themes/blue1/home/index.html.erb
+++ b/app/views/themes/blue1/home/index.html.erb
@@ -54,7 +54,7 @@
 </div>
 
 <div class="span3">
-<% cache("calendar_" + cache_array_key(@calentries)+params[:month].to_s+params[:year].to_s) do %>
+<% cache("calendar_" + cache_array_key(@calentries)+params[:month].to_s+params[:year].to_s+params[:theme].to_s) do %>
 <%= render 'calendars/calentries', :object=>@calentries %>
 <% end %>
 
diff --git a/db/migrate/20150602085525_add_preferredtheme_to_users.rb b/db/migrate/20150602085525_add_preferredtheme_to_users.rb
new file mode 100644
index 0000000..d59b47f
--- /dev/null
+++ b/db/migrate/20150602085525_add_preferredtheme_to_users.rb
@@ -0,0 +1,5 @@
+class AddPreferredthemeToUsers < ActiveRecord::Migration
+  def change
+    add_column :users, :preferredtheme, :string
+  end
+end