diff --git a/lib/validates_timeliness/conversion.rb b/lib/validates_timeliness/conversion.rb
index cf75c49..4e77a06 100644
--- a/lib/validates_timeliness/conversion.rb
+++ b/lib/validates_timeliness/conversion.rb
@@ -10,6 +10,8 @@ module ValidatesTimeliness
       when :datetime
         value.to_time.in_time_zone
       end
+    rescue
+      nil
     end
 
     def dummy_time(value)
diff --git a/lib/validates_timeliness/validator.rb b/lib/validates_timeliness/validator.rb
index 31a073b..099ffaf 100644
--- a/lib/validates_timeliness/validator.rb
+++ b/lib/validates_timeliness/validator.rb
@@ -35,10 +35,10 @@ module ValidatesTimeliness
       raw_value = attribute_raw_value(record, attr_name) || value
       return if (@allow_nil && raw_value.nil?) || (@allow_blank && raw_value.blank?)
 
-      return record.errors.add(attr_name, :"invalid_#{@type}") if value.blank?
-
       value = type_cast(value)
 
+      return record.errors.add(attr_name, :"invalid_#{@type}") if value.blank?
+
       @check_restrictions.each do |restriction|
         begin
           restriction_value = type_cast(evaluate_option_value(options[restriction], record))
diff --git a/spec/validates_timeliness/validator_spec.rb b/spec/validates_timeliness/validator_spec.rb
index 26d5fef..05676a7 100644
--- a/spec/validates_timeliness/validator_spec.rb
+++ b/spec/validates_timeliness/validator_spec.rb
@@ -26,6 +26,20 @@ describe ValidatesTimeliness::Validator do
     end
   end
 
+  it 'should not be valid for value which not valid date or time value' do
+    Person.validates_date :birth_date
+    invalid!(:birth_date, "Not a date", 'is not a valid date')
+  end
+
+  it 'should not be valid attribute is type cast to nil but raw value is non-nil invalid value' do
+    Person.validates_date :birth_date, :allow_nil => true
+    record = Person.new
+    record.stub!(:birth_date).and_return(nil)
+    record.stub!(:birth_date_before_type_cast).and_return("Not a date")
+    record.should_not be_valid
+    record.errors[:birth_date].first.should == 'is not a valid date'
+  end
+
   describe ":allow_nil option" do
     it 'should not allow nil by default' do
       Person.validates_date :birth_date