change time zone to UTC, show zone in timestamps

app/helpers/application_helper.rb

@@ -12,7 +12,7 @@ module ApplicationHelper
 
   def time(tm)
     if tm
-      content_tag :time, title: tm.strftime("%e %b %Y, %H:%M"), datetime: tm.to_datetime.rfc3339 do
+      content_tag :time, title: tm.strftime("%e %b %Y, %H:%M %Z"), datetime: tm.to_datetime.rfc3339 do
         tm.strftime("%e %b %Y, %H:%M")
       end
     end

config/application.rb

@@ -39,7 +39,7 @@ module Redstoner
 
     # Set Time.zone default to the specified zone and make Active Record auto-convert to this zone.
     # Run "rake -D time" for a list of tasks for finding time zone names. Default is UTC.
-    config.time_zone = 'Berlin'
+    config.time_zone = 'UTC'
 
     # The default locale is :en and all translations from config/locales/*.rb,yml are auto loaded.
     # config.i18n.load_path += Dir[Rails.root.join('my', 'locales', '*.{rb,yml}').to_s]