diff --git a/lib/validates_timeliness/multiparameter_attributes.rb b/lib/validates_timeliness/multiparameter_attributes.rb
index 435689f..a14d33c 100644
--- a/lib/validates_timeliness/multiparameter_attributes.rb
+++ b/lib/validates_timeliness/multiparameter_attributes.rb
@@ -4,17 +4,6 @@ module ValidatesTimeliness
     def self.included(base)
       base.alias_method_chain :execute_callstack_for_multiparameter_attributes, :timeliness
     end    
-        
-    def time_array_to_string(time_array, type)
-      case type
-        when :time
-          "%02d:%02d:%02d" % time_array[3..5]
-        when :date
-          "%04d-%02d-%02d" % time_array[0..2]
-        when :datetime
-          "%04d-%02d-%02d %02d:%02d:%02d" % time_array
-       end
-    end
   
     # Overrides AR method to store multiparameter time and dates as string
     # allowing validation later.
@@ -28,7 +17,7 @@ module ValidatesTimeliness
           column = column_for_attribute(name)
           begin
             value = if [:date, :time, :datetime].include?(column.type)
-              time_array_to_string(values, column.type)
+              time_array_to_string(values, column.type)  
             else
               klass.new(*values)
             end
@@ -39,10 +28,31 @@ module ValidatesTimeliness
         end
       end
       unless errors.empty?
-        puts errors.inspect
         raise ActiveRecord::MultiparameterAssignmentErrors.new(errors), "#{errors.size} error(s) on assignment of multiparameter attributes"
       end
     end
     
+    def time_array_to_string(values, type)
+      values = values.map(&:to_s)
+              
+      case type
+        when :date
+          extract_date_from_multiparameter_attributes(values)
+        when :time
+          extract_time_from_multiparameter_attributes(values)
+        when :datetime
+          date_values, time_values = values.slice!(0, 3), values
+          extract_date_from_multiparameter_attributes(date_values) + " " + extract_time_from_multiparameter_attributes(time_values)
+      end
+    end   
+       
+    def extract_date_from_multiparameter_attributes(values)
+      [values[0], *values.slice(1, 2).map { |s| s.rjust(2, "0") }].join("-")
+    end
+    
+    def extract_time_from_multiparameter_attributes(values)
+      values.last(3).map { |s| s.rjust(2, "0") }.join(":")
+    end
+    
   end
 end