diff --git a/app/src/MainWindow.cpp b/app/src/MainWindow.cpp
index b38845e..80c94f6 100644
--- a/app/src/MainWindow.cpp
+++ b/app/src/MainWindow.cpp
@@ -36,7 +36,6 @@
 
 #include <QAction>
 #include <QDate>
-#include <QDateTime>
 #include <QDir>
 #include <QFileDialog>
 #include <QToolBar>
diff --git a/core/include/Data/IDataSeries.h b/core/include/Data/IDataSeries.h
index 5dfa75a..2710e1b 100644
--- a/core/include/Data/IDataSeries.h
+++ b/core/include/Data/IDataSeries.h
@@ -23,7 +23,7 @@ struct Unit {
     inline bool operator!=(const Unit &other) const { return !(*this == other); }
 
     QString m_Name;  ///< Unit name
-    bool m_TimeUnit; ///< The unit is a unit of time
+    bool m_TimeUnit; ///< The unit is a unit of time (UTC)
 };
 
 /**
diff --git a/core/include/Data/SqpDateTime.h b/core/include/Data/SqpDateTime.h
index 450e9eb..b4c51c5 100644
--- a/core/include/Data/SqpDateTime.h
+++ b/core/include/Data/SqpDateTime.h
@@ -12,9 +12,9 @@
  * @brief The SqpDateTime struct holds the information of time parameters
  */
 struct SqpDateTime {
-    /// Start time
+    /// Start time (UTC)
     double m_TStart;
-    /// End time
+    /// End time (UTC)
     double m_TEnd;
 
     bool contains(const SqpDateTime &dateTime) const noexcept
diff --git a/core/src/Variable/VariableController.cpp b/core/src/Variable/VariableController.cpp
index c439435..e69b4de 100644
--- a/core/src/Variable/VariableController.cpp
+++ b/core/src/Variable/VariableController.cpp
@@ -8,7 +8,6 @@
 #include <Data/IDataSeries.h>
 #include <Time/TimeController.h>
 
-#include <QDateTime>
 #include <QMutex>
 #include <QThread>
 #include <QUuid>
diff --git a/plugins/amda/tests/TestAmdaResultParser.cpp b/plugins/amda/tests/TestAmdaResultParser.cpp
index 0501e79..702b367 100644
--- a/plugins/amda/tests/TestAmdaResultParser.cpp
+++ b/plugins/amda/tests/TestAmdaResultParser.cpp
@@ -99,7 +99,7 @@ void TestAmdaResultParser::testReadTxt_data()
     // ////////// //
 
     auto dateTime = [](int year, int month, int day, int hours, int minutes, int seconds) {
-        return QDateTime{{year, month, day}, {hours, minutes, seconds}};
+        return QDateTime{{year, month, day}, {hours, minutes, seconds}, Qt::UTC};
     };
 
     // Valid file
diff --git a/plugins/mockplugin/src/CosinusProvider.cpp b/plugins/mockplugin/src/CosinusProvider.cpp
index d49bd10..bdc4345 100644
--- a/plugins/mockplugin/src/CosinusProvider.cpp
+++ b/plugins/mockplugin/src/CosinusProvider.cpp
@@ -5,7 +5,6 @@
 
 #include <cmath>
 
-#include <QDateTime>
 #include <QFuture>
 #include <QThread>
 #include <QtConcurrent/QtConcurrent>