diff --git a/src/oatpp-mongo/bson/Types.cpp b/src/oatpp-mongo/bson/Types.cpp
index fc02c90..e1771c4 100644
--- a/src/oatpp-mongo/bson/Types.cpp
+++ b/src/oatpp-mongo/bson/Types.cpp
@@ -32,6 +32,7 @@ namespace __class {
   const ClassId InlineDocument::CLASS_ID("oatpp::mongo::InlineDocument");
   const ClassId InlineArray::CLASS_ID("oatpp::mongo::InlineArray");
   const ClassId ObjectId::CLASS_ID("oatpp::mongo::ObjectId");
+  const ClassId DateTime::CLASS_ID("oatpp::mongo::DateTime");
 
 }
 
diff --git a/src/oatpp-mongo/bson/Types.hpp b/src/oatpp-mongo/bson/Types.hpp
index 1e0fab6..4df0d73 100644
--- a/src/oatpp-mongo/bson/Types.hpp
+++ b/src/oatpp-mongo/bson/Types.hpp
@@ -187,6 +187,17 @@ namespace __class {
 
   };
 
+  class DateTime {
+  public:
+    static const ClassId CLASS_ID;
+
+    static Type *getType() {
+      static Type type(CLASS_ID, nullptr);
+      return &type;
+    }
+
+  };
+
 }
 
 /**
@@ -206,6 +217,11 @@ typedef oatpp::data::mapping::type::ObjectWrapper<oatpp::base::StrBuffer, __clas
  */
 typedef oatpp::data::mapping::type::Primitive<type::ObjectId, __class::ObjectId> ObjectId;
 
+/**
+ * DateTime is an ObjectWrapper over `v_int64` and __class::DateTime.
+ */
+typedef oatpp::data::mapping::type::Primitive<v_int64, __class::DateTime> DateTime;
+
 }}}
 
 #endif // oatpp_mongo_bson_Types_hpp
diff --git a/src/oatpp-mongo/bson/mapping/Deserializer.cpp b/src/oatpp-mongo/bson/mapping/Deserializer.cpp
index 1251a36..42ea361 100644
--- a/src/oatpp-mongo/bson/mapping/Deserializer.cpp
+++ b/src/oatpp-mongo/bson/mapping/Deserializer.cpp
@@ -74,6 +74,8 @@ Deserializer::Deserializer(const std::shared_ptr<Config>& config)
 
   setDeserializerMethod(oatpp::mongo::bson::__class::ObjectId::CLASS_ID, &Deserializer::deserializeObjectId);
 
+  setDeserializerMethod(oatpp::mongo::bson::__class::DateTime::CLASS_ID, &Deserializer::deserializeDateTime);
+
 }
 
 void Deserializer::setDeserializerMethod(const data::mapping::type::ClassId& classId, DeserializerMethod method) {
@@ -199,6 +201,29 @@ oatpp::Void Deserializer::deserializeBoolean(Deserializer* deserializer,
 
 }
 
+oatpp::Void Deserializer::deserializeDateTime(Deserializer* deserializer,
+                                              parser::Caret& caret,
+                                              const Type* const type,
+                                              v_char8 bsonTypeCode)
+{
+  (void) deserializer;
+  (void) type;
+
+  switch(bsonTypeCode) {
+
+    case TypeCode::NULL_VALUE:
+      return oatpp::Void(DateTime::Class::getType());
+
+    case TypeCode::DATE_TIME:
+      return DateTime(Utils::readInt64(caret));
+
+    default:
+      caret.setError("[oatpp::mongo::bson::mapping::Deserializer::deserializeDateTime()]: Error. Type-code doesn't match DateTime.");
+      return oatpp::Void(DateTime::Class::getType());
+
+  }
+}
+
 oatpp::Void Deserializer::deserializeString(Deserializer* deserializer,
                                             parser::Caret& caret,
                                             const Type* const type,
diff --git a/src/oatpp-mongo/bson/mapping/Deserializer.hpp b/src/oatpp-mongo/bson/mapping/Deserializer.hpp
index e97e270..646d75e 100644
--- a/src/oatpp-mongo/bson/mapping/Deserializer.hpp
+++ b/src/oatpp-mongo/bson/mapping/Deserializer.hpp
@@ -268,6 +268,7 @@ class Deserializer {
   }
 
   static oatpp::Void deserializeBoolean(Deserializer* deserializer, parser::Caret& caret, const Type* const type, v_char8 bsonTypeCode);
+  static oatpp::Void deserializeDateTime(Deserializer* deserializer, parser::Caret& caret, const Type* const type, v_char8 bsonTypeCode);
   static oatpp::Void deserializeString(Deserializer* deserializer, parser::Caret& caret, const Type* const type, v_char8 bsonTypeCode);
 
   static oatpp::Void deserializeInlineDocs(Deserializer* deserializer, parser::Caret& caret, const Type* const type, v_char8 bsonTypeCode);
diff --git a/src/oatpp-mongo/bson/mapping/Serializer.cpp b/src/oatpp-mongo/bson/mapping/Serializer.cpp
index fe55ba2..e241145 100644
--- a/src/oatpp-mongo/bson/mapping/Serializer.cpp
+++ b/src/oatpp-mongo/bson/mapping/Serializer.cpp
@@ -75,6 +75,8 @@ Serializer::Serializer(const std::shared_ptr<Config>& config)
 
   setSerializerMethod(oatpp::mongo::bson::__class::ObjectId::CLASS_ID, &Serializer::serializeObjectId);
 
+  setSerializerMethod(oatpp::mongo::bson::__class::DateTime::CLASS_ID, &Serializer::serializeDateTime);
+
 }
 
 void Serializer::setSerializerMethod(const data::mapping::type::ClassId& classId, SerializerMethod method) {
@@ -86,6 +88,25 @@ void Serializer::setSerializerMethod(const data::mapping::type::ClassId& classId
   }
 }
 
+void Serializer::serializeDateTime(Serializer* serializer,
+                                   data::stream::ConsistentOutputStream* stream,
+                                   const data::share::StringKeyLabel& key,
+                                   const oatpp::Void& polymorph)
+{
+  (void) serializer;
+
+  if(!key) {
+    throw std::runtime_error("[oatpp::mongo::bson::mapping::Serializer::serializeDateTime()]: Error. The key can't be null.");
+  }
+
+  if(polymorph) {
+    bson::Utils::writeKey(stream, TypeCode::DATE_TIME, key);
+    bson::Utils::writeInt64(stream, *static_cast<v_int64*>(polymorph.get()));
+  } else {
+    bson::Utils::writeKey(stream, TypeCode::NULL_VALUE, key);
+  }
+}
+
 void Serializer::serializeString(Serializer* serializer,
                                  data::stream::ConsistentOutputStream* stream,
                                  const data::share::StringKeyLabel& key,
diff --git a/src/oatpp-mongo/bson/mapping/Serializer.hpp b/src/oatpp-mongo/bson/mapping/Serializer.hpp
index 0827ae4..0dcbf9f 100644
--- a/src/oatpp-mongo/bson/mapping/Serializer.hpp
+++ b/src/oatpp-mongo/bson/mapping/Serializer.hpp
@@ -104,7 +104,6 @@ class Serializer {
     }
 
     if(polymorph) {
-      auto str = static_cast<oatpp::base::StrBuffer *>(polymorph.get());
       bson::Utils::writePrimitive(stream, key, * static_cast<typename T::ObjectType*>(polymorph.get()));
     } else {
       bson::Utils::writeKey(stream, TypeCode::NULL_VALUE, key);
@@ -181,6 +180,11 @@ class Serializer {
 
   }
 
+  static void serializeDateTime(Serializer* serializer,
+                                data::stream::ConsistentOutputStream* stream,
+                                const data::share::StringKeyLabel& key,
+                                const oatpp::Void& polymorph);
+
   static void serializeString(Serializer* serializer,
                               data::stream::ConsistentOutputStream* stream,
                               const data::share::StringKeyLabel& key,