diff --git a/lib/active_record/connection_adapters/sqlserver/core_ext/attribute.rb b/lib/active_record/connection_adapters/sqlserver/core_ext/attribute.rb
new file mode 100644
index 000000000..6762b9a1c
--- /dev/null
+++ b/lib/active_record/connection_adapters/sqlserver/core_ext/attribute.rb
@@ -0,0 +1,22 @@
+require 'active_record/attribute'
+
+module ActiveRecord
+  class Attribute
+
+    SQLSERVER_DATE_TIME_TYPES = [
+      Type::SQLServer::Date,
+      Type::SQLServer::DateTime,
+      Type::SQLServer::Time
+    ].freeze
+
+    prepend Module.new {
+      def forgetting_assignment
+        case type
+        when *SQLSERVER_DATE_TIME_TYPES then with_value_from_database(value)
+        else super
+        end
+      end
+    }
+
+  end
+end
diff --git a/lib/active_record/connection_adapters/sqlserver_adapter.rb b/lib/active_record/connection_adapters/sqlserver_adapter.rb
index aa3171a72..64f8ec7d1 100644
--- a/lib/active_record/connection_adapters/sqlserver_adapter.rb
+++ b/lib/active_record/connection_adapters/sqlserver_adapter.rb
@@ -8,6 +8,7 @@
 require 'active_record/connection_adapters/sqlserver/core_ext/attribute_methods'
 require 'active_record/connection_adapters/sqlserver/version'
 require 'active_record/connection_adapters/sqlserver/type'
+require 'active_record/connection_adapters/sqlserver/core_ext/attribute'
 require 'active_record/connection_adapters/sqlserver/database_limits'
 require 'active_record/connection_adapters/sqlserver/database_statements'
 require 'active_record/connection_adapters/sqlserver/database_tasks'