diff --git a/src/Learning/KWData/CMakeLists.txt b/src/Learning/KWData/CMakeLists.txt
index 5b0d2d870..b72a43da8 100644
--- a/src/Learning/KWData/CMakeLists.txt
+++ b/src/Learning/KWData/CMakeLists.txt
@@ -61,6 +61,7 @@ add_library(
   KWSymbol.cpp
   KWTextService.cpp
   KWTextTokenizer.cpp
+  KWDateTime.cpp
   KWTime.cpp
   KWTimestamp.cpp
   KWTimestampTZ.cpp
diff --git a/src/Learning/KWData/KWTime.h b/src/Learning/KWData/KWTime.h
index a227c5356..b3f2b9d71 100644
--- a/src/Learning/KWData/KWTime.h
+++ b/src/Learning/KWData/KWTime.h
@@ -8,6 +8,7 @@ class Time;
 class KWTimeFormat;
 
 #include "Object.h"
+#include "KWDateTime.h"
 #include "Vector.h"
 
 ////////////////////////////////////////////////////////////////////////////////////
diff --git a/src/Learning/MODL/MODL.cpp b/src/Learning/MODL/MODL.cpp
index 2e8c58b25..6e62c46cb 100644
--- a/src/Learning/MODL/MODL.cpp
+++ b/src/Learning/MODL/MODL.cpp
@@ -30,16 +30,17 @@ int main(int argc, char** argv)
 	MDKhiopsLearningProject learningProject;
 
 	//DDD
+	DateTime::Test();
 	/*DDD
 	cout << "TEST Time\n";
 	Time::Test();
 	cout << "TEST Date\n";
 	Date::Test();
-	*/
 	cout << "TEST Timestamp\n";
 	Timestamp::Test();
 	cout << "TEST TimestampTZ\n";
 	TimestampTZ::Test();
+	*/
 	return 0;
 
 	// Activation de la gestion des signaux via des erreurs, pour afficher des messages d'erreur explicites