diff --git a/lib/fog/core/time.rb b/lib/fog/core/time.rb
index d73452d9b..874de0eff 100644
--- a/lib/fog/core/time.rb
+++ b/lib/fog/core/time.rb
@@ -19,8 +19,7 @@ module Fog
     end
 
     def to_date_header
-      now = self.class.now.utc
-      now.strftime("#{DAYS[now.wday]}, %d #{MONTHS[now.month - 1]} %Y %H:%M:%S +0000")
+      self.utc.strftime("#{DAYS[self.utc.wday]}, %d #{MONTHS[self.utc.month - 1]} %Y %H:%M:%S +0000")
     end
 
   end