diff --git a/CHANGELOG.rdoc b/CHANGELOG.rdoc
index 81990ce..641e064 100644
--- a/CHANGELOG.rdoc
+++ b/CHANGELOG.rdoc
@@ -1,3 +1,6 @@
+= 4.1.0 [2015-08-21]
+* Restore extensions for Rails 4 (< 4.2)
+
 = 4.0.0 [2015-07-19]
 * Better compatibility with Rails 4.x (and drop support < 4.0)
 * Support Ruby 2.0+
diff --git a/lib/validates_timeliness/extensions.rb b/lib/validates_timeliness/extensions.rb
index e76485c..8cd5a23 100644
--- a/lib/validates_timeliness/extensions.rb
+++ b/lib/validates_timeliness/extensions.rb
@@ -1,14 +1,16 @@
 module ValidatesTimeliness
   module Extensions
-    autoload :DateTimeSelect,        'validates_timeliness/extensions/date_time_select'
-    autoload :MultiparameterHandler, 'validates_timeliness/extensions/multiparameter_handler'
+    autoload :DateTimeSelect,         'validates_timeliness/extensions/date_time_select'
+    autoload :AttributeAssignment,     'validates_timeliness/extensions/attribute_assignment'
+    autoload :MultiparameterAttribute, 'validates_timeliness/extensions/multiparameter_attribute'
   end
 
   def self.enable_date_time_select_extension!
-    ::ActionView::Helpers::InstanceTag.send(:include, ValidatesTimeliness::Extensions::DateTimeSelect)
+    ::ActionView::Helpers::Tags::DateSelect.send(:include, ValidatesTimeliness::Extensions::DateTimeSelect)
   end
 
   def self.enable_multiparameter_extension!
-    ::ActiveRecord::Base.send(:include, ValidatesTimeliness::Extensions::MultiparameterHandler)
+    ::ActiveRecord::Base.send(:include, ValidatesTimeliness::Extensions::AttributeAssignment)
+    ::ActiveRecord::AttributeAssignment::MultiparameterAttribute.send(:include, ValidatesTimeliness::Extensions::MultiparameterAttribute)
   end
 end
diff --git a/lib/validates_timeliness/extensions/attribute_assignment.rb b/lib/validates_timeliness/extensions/attribute_assignment.rb
new file mode 100644
index 0000000..ed91e18
--- /dev/null
+++ b/lib/validates_timeliness/extensions/attribute_assignment.rb
@@ -0,0 +1,33 @@
+module ValidatesTimeliness
+  module Extensions
+    module AttributeAssignment
+      extend ActiveSupport::Concern
+
+      # Stricter handling of date and time values from multiparameter
+      # assignment from the date/time select view helpers
+
+      included do
+        alias_method :execute_callstack_for_multiparameter_attributes, :execute_callstack_for_multiparameter_attributes_with_timeliness
+      end
+
+      private
+
+      def execute_callstack_for_multiparameter_attributes_with_timeliness(callstack)
+        errors = []
+        callstack.each do |name, values_with_empty_parameters|
+          begin
+            send("#{name}=", self.class::MultiparameterAttribute.new(self, name, values_with_empty_parameters).read_value)
+          rescue => ex
+            values = values_with_empty_parameters.is_a?(Hash) ? values_with_empty_parameters.values : values_with_empty_parameters
+            errors << ActiveRecord::AttributeAssignmentError.new("error on assignment #{values.inspect} to #{name} (#{ex.message})", ex, name)
+          end
+        end
+        unless errors.empty?
+          error_descriptions = errors.map { |ex| ex.message }.join(",")
+          raise ActiveRecord::MultiparameterAssignmentErrors.new(errors), "#{errors.size} error(s) on assignment of multiparameter attributes [#{error_descriptions}]"
+        end
+      end
+
+    end
+  end
+end
diff --git a/lib/validates_timeliness/extensions/multiparameter_attribute.rb b/lib/validates_timeliness/extensions/multiparameter_attribute.rb
new file mode 100644
index 0000000..b127852
--- /dev/null
+++ b/lib/validates_timeliness/extensions/multiparameter_attribute.rb
@@ -0,0 +1,66 @@
+module ValidatesTimeliness
+  module Extensions
+    module MultiparameterAttribute
+      extend ActiveSupport::Concern
+
+      # Stricter handling of date and time values from multiparameter
+      # assignment from the date/time select view helpers
+
+      included do
+        alias_method_chain :instantiate_time_object, :timeliness
+        alias_method :read_value, :read_value_with_timeliness
+      end
+
+
+#      private
+
+      def invalid_multiparameter_date_or_time_as_string(set_values)
+        value =  [set_values[0], *set_values[1..2].map {|s| s.to_s.rjust(2,"0")} ].join("-")
+        value += ' ' + set_values[3..5].map {|s| s.to_s.rjust(2, "0") }.join(":") unless set_values[3..5].empty?
+        value
+      end
+
+      def instantiate_time_object_with_timeliness(set_values)
+        validate_multiparameter_date_values(set_values) {
+          instantiate_time_object_without_timeliness(set_values)
+        }
+      end
+
+      def instantiate_date_object(set_values)
+        validate_multiparameter_date_values(set_values) {
+          Date.new(*set_values)
+        }
+      end
+
+      # Yield if date values are valid
+      def validate_multiparameter_date_values(set_values)
+        if set_values[0..2].all?{ |v| v.present? } && Date.valid_civil?(*set_values[0..2])
+          yield
+        else
+          invalid_multiparameter_date_or_time_as_string(set_values)
+        end
+      end
+
+      def read_value_with_timeliness
+        @column = object.class.reflect_on_aggregation(name.to_sym) || object.column_for_attribute(name)
+        klass   = column.klass
+
+        set_values = values.is_a?(Hash) ? values.to_a.sort_by(&:first).map(&:last) : values
+        if set_values.empty? || set_values.all?{ |v| v.nil? }
+          nil
+        elsif klass == Time
+          instantiate_time_object(set_values)
+        elsif klass == Date
+          instantiate_date_object(set_values)
+        else
+          if respond_to?(:read_other_parameter_value)
+            read_date_parameter_value(name, values)
+          else
+            klass.new(*set_values)
+          end
+        end
+      end
+
+    end
+  end
+end
diff --git a/lib/validates_timeliness/extensions/multiparameter_handler.rb b/lib/validates_timeliness/extensions/multiparameter_handler.rb
index 3da494d..dee3f8a 100644
--- a/lib/validates_timeliness/extensions/multiparameter_handler.rb
+++ b/lib/validates_timeliness/extensions/multiparameter_handler.rb
@@ -3,7 +3,7 @@ module Extensions
     module MultiparameterHandler
       extend ActiveSupport::Concern
 
-      # Stricter handling of date and time values from multiparameter 
+      # Stricter handling of date and time values from multiparameter
       # assignment from the date/time select view helpers
 
       included do
@@ -66,7 +66,7 @@ def execute_callstack_for_multiparameter_attributes_with_timeliness(callstack)
           begin
             send(name + "=", read_value_from_parameter(name, values_with_empty_parameters))
           rescue => ex
-            values = values_with_empty_parameters.is_a?(Hash) ? values_with_empty_parameters.values : values_with_empty_parameters 
+            values = values_with_empty_parameters.is_a?(Hash) ? values_with_empty_parameters.values : values_with_empty_parameters
             errors << ActiveRecord::AttributeAssignmentError.new("error on assignment #{values.inspect} to #{name}", ex, name)
           end
         end
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index c7d8f9c..8bbbd2c 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -23,8 +23,8 @@
 
 ValidatesTimeliness.setup do |c|
   c.extend_orms = [ :active_record ]
-  # c.enable_date_time_select_extension!
-  # c.enable_multiparameter_extension!
+  c.enable_date_time_select_extension!
+  c.enable_multiparameter_extension!
   c.default_timezone = :utc
 end
 
diff --git a/spec/validates_timeliness/conversion_spec.rb b/spec/validates_timeliness/conversion_spec.rb
index e62a47d..ca3b784 100644
--- a/spec/validates_timeliness/conversion_spec.rb
+++ b/spec/validates_timeliness/conversion_spec.rb
@@ -157,12 +157,12 @@
       expect(evaluate_option_value(:birth_time, person)).to eq(value)
     end
 
-    it 'should return Time value is default zone from string time value' do
+    it 'should return Time value in default zone from string time value' do
       value = '2010-01-01 12:00:00'
       expect(evaluate_option_value(value, person)).to eq(Time.utc(2010,1,1,12,0,0))
     end
 
-    it 'should return Time value is current zone from string time value if timezone aware' do
+    it 'should return Time value in current zone from string time value if timezone aware' do
       @timezone_aware = true
       value = '2010-01-01 12:00:00'
       expect(evaluate_option_value(value, person)).to eq(Time.zone.local(2010,1,1,12,0,0))
@@ -174,9 +174,9 @@
     end
 
     it 'should return Time value for attribute method symbol which returns string time value' do
-      value = '2010-01-01 12:00:00'
+      value = '2010-01-01 12:00:00 UTC'
       person.birth_time = value
-      expect(evaluate_option_value(:birth_time, person)).to eq(Time.local(2010,1,1,12,0,0))
+      expect(evaluate_option_value(:birth_time, person)).to eq(Time.utc(2010,1,1,12,0,0))
     end
 
     context "restriction shorthand" do
diff --git a/spec/validates_timeliness/extensions/multiparameter_handler_spec.rb b/spec/validates_timeliness/extensions/multiparameter_handler_spec.rb
index 3ed00b0..5040f0d 100644
--- a/spec/validates_timeliness/extensions/multiparameter_handler_spec.rb
+++ b/spec/validates_timeliness/extensions/multiparameter_handler_spec.rb
@@ -1,44 +1,41 @@
-# require 'spec_helper'
-#
-# describe ValidatesTimeliness::Extensions::MultiparameterHandler do
-#
-#   context "time column" do
-#     it 'should assign a string value for invalid date portion' do
-#       employee = record_with_multiparameter_attribute(:birth_datetime, [2000, 2, 31, 12, 0, 0])
-#       expect(employee.birth_datetime_before_type_cast).to eq '2000-02-31 12:00:00'
-#     end
-#
-#     it 'should assign a Time value for valid datetimes' do
-#       employee = record_with_multiparameter_attribute(:birth_datetime, [2000, 2, 28, 12, 0, 0])
-#       expect(employee.birth_datetime_before_type_cast).to eq Time.zone.local(2000, 2, 28, 12, 0, 0)
-#     end
-#
-#     it 'should assign a string value for incomplete time' do
-#       employee = record_with_multiparameter_attribute(:birth_datetime, [2000, nil, nil])
-#       expect(employee.birth_datetime_before_type_cast).to eq '2000-00-00'
-#     end
-#   end
-#
-#   context "date column" do
-#     it 'should assign a string value for invalid date' do
-#       employee = record_with_multiparameter_attribute(:birth_date, [2000, 2, 31])
-#       expect(employee.birth_date_before_type_cast).to eq '2000-02-31'
-#     end
-#
-#     it 'should assign a Date value for valid date' do
-#       employee = record_with_multiparameter_attribute(:birth_date, [2000, 2, 28])
-#       expect(employee.birth_date_before_type_cast).to eq Date.new(2000, 2, 28)
-#     end
-#
-#     it 'should assign a string value for incomplete date' do
-#       employee = record_with_multiparameter_attribute(:birth_date, [2000, nil, nil])
-#       expect(employee.birth_date_before_type_cast).to eq '2000-00-00'
-#     end
-#   end
-#
-#   def record_with_multiparameter_attribute(name, values)
-#     hash = {}
-#     values.each_with_index {|value, index| hash["#{name}(#{index+1}i)"] = value.to_s }
-#     Employee.new(hash)
-#   end
-# end
+require 'spec_helper'
+
+describe ValidatesTimeliness::Extensions do
+  
+  context "time column" do
+    it 'should assign a string value for invalid date portion' do
+      employee = record_with_multiparameter_attribute(:birth_datetime, [2000, 2, 31, 12, 0, 0])
+      expect(employee.birth_datetime_before_type_cast.class).to eq String
+      expect(employee.birth_datetime_before_type_cast).to be_a(String)
+      expect(employee.birth_datetime_before_type_cast).to eq '2000-02-31 12:00:00'
+    end
+
+    it 'should assign a Time value for valid datetimes' do
+      employee = record_with_multiparameter_attribute(:birth_datetime, [2000, 2, 28, 12, 0, 0])
+      expect(employee.birth_datetime_before_type_cast).to eq Time.zone.local(2000, 2, 28, 12, 0, 0)
+    end
+  end
+
+  context "date column" do
+    it 'should assign a string value for invalid date' do
+      employee = record_with_multiparameter_attribute(:birth_date, [2000, 2, 31])
+      expect(employee.birth_date_before_type_cast).to eq '2000-02-31'
+    end
+
+    it 'should assign a Date value for valid date' do
+      employee = record_with_multiparameter_attribute(:birth_date, [2000, 2, 28])
+      expect(employee.birth_date_before_type_cast).to eq Date.new(2000, 2, 28)
+    end
+
+    it 'should assign a string value for incomplete date' do
+      employee = record_with_multiparameter_attribute(:birth_date, [2000, nil, nil])
+      expect(employee.birth_date_before_type_cast).to eq '2000-00-00'
+    end
+  end
+
+  def record_with_multiparameter_attribute(name, values)
+    hash = {}
+    values.each_with_index {|value, index| hash["#{name}(#{index+1}i)"] = value.to_s }
+    Employee.new(hash)
+  end
+end
diff --git a/spec/validates_timeliness/orm/active_record_spec.rb b/spec/validates_timeliness/orm/active_record_spec.rb
index f8d3069..94d639c 100644
--- a/spec/validates_timeliness/orm/active_record_spec.rb
+++ b/spec/validates_timeliness/orm/active_record_spec.rb
@@ -52,21 +52,21 @@ class Janitor < Employee
       record.birth_date = '2012-01-01'
 
       record.valid?
-      record.errors[:birth_date].should be_empty
+      expect(record.errors[:birth_date]).to be_empty
     end
 
     it "should validate a invalid value string" do
       record.birth_date = 'not a date'
 
       record.valid?
-      record.errors[:birth_date].should_not be_empty
+      expect(record.errors[:birth_date]).not_to be_empty
     end
 
     it "should validate a nil value" do
       record.birth_date = nil
 
       record.valid?
-      record.errors[:birth_date].should be_empty
+      expect(record.errors[:birth_date]).to be_empty
     end
   end