diff --git a/ApplicationCode/Application/Tools/RiaQDateTimeTools.cpp b/ApplicationCode/Application/Tools/RiaQDateTimeTools.cpp
index 1cd5e4acd4..614fe25021 100644
--- a/ApplicationCode/Application/Tools/RiaQDateTimeTools.cpp
+++ b/ApplicationCode/Application/Tools/RiaQDateTimeTools.cpp
@@ -41,14 +41,6 @@ const DateTimeSpan RiaQDateTimeTools::TIMESPAN_HALFYEAR = DateTimeSpan( 0, 6, 0
 const DateTimeSpan RiaQDateTimeTools::TIMESPAN_YEAR     = DateTimeSpan( 1, 0, 0 );
 const DateTimeSpan RiaQDateTimeTools::TIMESPAN_DECADE   = DateTimeSpan( 10, 0, 0 );
 
-const QString RiaQDateTimeTools::TIMESPAN_DAY_NAME      = "Day";
-const QString RiaQDateTimeTools::TIMESPAN_WEEK_NAME     = "Week";
-const QString RiaQDateTimeTools::TIMESPAN_MONTH_NAME    = "Month";
-const QString RiaQDateTimeTools::TIMESPAN_QUARTER_NAME  = "Quarter";
-const QString RiaQDateTimeTools::TIMESPAN_HALFYEAR_NAME = "Half Year";
-const QString RiaQDateTimeTools::TIMESPAN_YEAR_NAME     = "Year";
-const QString RiaQDateTimeTools::TIMESPAN_DECADE_NAME   = "Decade";
-
 namespace caf
 {
 template <>
@@ -70,6 +62,21 @@ void caf::AppEnum<RiaQDateTimeTools::TimeFormatComponents>::setUp()
     addItem( RiaQDateTimeTools::TIME_FORMAT_HOUR_MINUTE_SECOND, "HOUR_MINUTE_SECONDS", "Hour, Minutes and Seconds" );
     setDefault( RiaQDateTimeTools::TIME_FORMAT_NONE );
 }
+
+template <>
+void caf::AppEnum<RiaQDateTimeTools::DateTimePeriod>::setUp()
+{
+    addItem( RiaQDateTimeTools::DateTimePeriod::NONE, "NONE", "None" );
+    addItem( RiaQDateTimeTools::DateTimePeriod::DAY, "DAY", "Day" );
+    addItem( RiaQDateTimeTools::DateTimePeriod::WEEK, "WEEK", "Week" );
+    addItem( RiaQDateTimeTools::DateTimePeriod::MONTH, "MONTH", "Month" );
+    addItem( RiaQDateTimeTools::DateTimePeriod::QUARTER, "QUARTER", "Quarter," );
+    addItem( RiaQDateTimeTools::DateTimePeriod::HALFYEAR, "HALFYEAR", "Half Year" );
+    addItem( RiaQDateTimeTools::DateTimePeriod::YEAR, "YEAR,", "Year," );
+    addItem( RiaQDateTimeTools::DateTimePeriod::DECADE, "DECADE", "Decade" );
+    setDefault( RiaQDateTimeTools::DateTimePeriod::NONE );
+}
+
 } // namespace caf
 
 //--------------------------------------------------------------------------------------------------
@@ -188,7 +195,7 @@ QDateTime RiaQDateTimeTools::subtractSpan( const QDateTime& dt, DateTimeSpan spa
 //--------------------------------------------------------------------------------------------------
 ///
 //--------------------------------------------------------------------------------------------------
-QDateTime RiaQDateTimeTools::addPeriod( const QDateTime& dt, DateTimePeriod period )
+QDateTime RiaQDateTimeTools::addPeriod( const QDateTime& dt, RiaQDateTimeTools::DateTimePeriod period )
 {
     return addSpan( dt, timeSpan( period ) );
 }
@@ -196,7 +203,7 @@ QDateTime RiaQDateTimeTools::addPeriod( const QDateTime& dt, DateTimePeriod peri
 //--------------------------------------------------------------------------------------------------
 ///
 //--------------------------------------------------------------------------------------------------
-QDateTime RiaQDateTimeTools::subtractPeriod( const QDateTime& dt, DateTimePeriod period )
+QDateTime RiaQDateTimeTools::subtractPeriod( const QDateTime& dt, RiaQDateTimeTools::DateTimePeriod period )
 {
     return subtractSpan( dt, timeSpan( period ) );
 }
@@ -266,23 +273,23 @@ bool RiaQDateTimeTools::lessThan( const QDateTime& dt1, const QDateTime& dt2 )
 //--------------------------------------------------------------------------------------------------
 ///
 //--------------------------------------------------------------------------------------------------
-const DateTimeSpan RiaQDateTimeTools::timeSpan( DateTimePeriod period )
+const DateTimeSpan RiaQDateTimeTools::timeSpan( RiaQDateTimeTools::DateTimePeriod period )
 {
     switch ( period )
     {
-        case DateTimePeriod::DAY:
+        case RiaQDateTimeTools::DateTimePeriod::DAY:
             return TIMESPAN_DAY;
-        case DateTimePeriod::WEEK:
+        case RiaQDateTimeTools::DateTimePeriod::WEEK:
             return TIMESPAN_WEEK;
-        case DateTimePeriod::MONTH:
+        case RiaQDateTimeTools::DateTimePeriod::MONTH:
             return TIMESPAN_MONTH;
-        case DateTimePeriod::QUARTER:
+        case RiaQDateTimeTools::DateTimePeriod::QUARTER:
             return TIMESPAN_QUARTER;
-        case DateTimePeriod::HALFYEAR:
+        case RiaQDateTimeTools::DateTimePeriod::HALFYEAR:
             return TIMESPAN_HALFYEAR;
-        case DateTimePeriod::YEAR:
+        case RiaQDateTimeTools::DateTimePeriod::YEAR:
             return TIMESPAN_YEAR;
-        case DateTimePeriod::DECADE:
+        case RiaQDateTimeTools::DateTimePeriod::DECADE:
             return TIMESPAN_DECADE;
     }
     CVF_ASSERT( false );
@@ -292,7 +299,7 @@ const DateTimeSpan RiaQDateTimeTools::timeSpan( DateTimePeriod period )
 //--------------------------------------------------------------------------------------------------
 ///
 //--------------------------------------------------------------------------------------------------
-QDateTime RiaQDateTimeTools::truncateTime( const QDateTime& dt, DateTimePeriod period )
+QDateTime RiaQDateTimeTools::truncateTime( const QDateTime& dt, RiaQDateTimeTools::DateTimePeriod period )
 {
     int y   = dt.date().year();
     int m   = dt.date().month();
@@ -301,19 +308,19 @@ QDateTime RiaQDateTimeTools::truncateTime( const QDateTime& dt, DateTimePeriod p
 
     switch ( period )
     {
-        case DateTimePeriod::DAY:
+        case RiaQDateTimeTools::DateTimePeriod::DAY:
             return createUtcDateTime( QDate( y, m, d ) );
-        case DateTimePeriod::WEEK:
+        case RiaQDateTimeTools::DateTimePeriod::WEEK:
             return createUtcDateTime( QDate( y, m, d ).addDays( -dow + 1 ) );
-        case DateTimePeriod::MONTH:
+        case RiaQDateTimeTools::DateTimePeriod::MONTH:
             return createUtcDateTime( QDate( y, m, 1 ) );
-        case DateTimePeriod::QUARTER:
+        case RiaQDateTimeTools::DateTimePeriod::QUARTER:
             return createUtcDateTime( QDate( y, ( ( m - 1 ) / 3 ) * 3 + 1, 1 ) );
-        case DateTimePeriod::HALFYEAR:
+        case RiaQDateTimeTools::DateTimePeriod::HALFYEAR:
             return createUtcDateTime( QDate( y, ( ( m - 1 ) / 6 ) * 6 + 1, 1 ) );
-        case DateTimePeriod::YEAR:
+        case RiaQDateTimeTools::DateTimePeriod::YEAR:
             return createUtcDateTime( QDate( y, 1, 1 ) );
-        case DateTimePeriod::DECADE:
+        case RiaQDateTimeTools::DateTimePeriod::DECADE:
             return createUtcDateTime( QDate( ( y / 10 ) * 10, 1, 1 ) );
     }
     CVF_ASSERT( false );
@@ -323,44 +330,24 @@ QDateTime RiaQDateTimeTools::truncateTime( const QDateTime& dt, DateTimePeriod p
 //--------------------------------------------------------------------------------------------------
 ///
 //--------------------------------------------------------------------------------------------------
-std::vector<DateTimePeriod> RiaQDateTimeTools::dateTimePeriods()
+std::vector<RiaQDateTimeTools::DateTimePeriod> RiaQDateTimeTools::dateTimePeriods()
 {
-    return std::vector<DateTimePeriod>( {
-        DateTimePeriod::NONE,
-        DateTimePeriod::DAY,
-        DateTimePeriod::WEEK,
-        DateTimePeriod::MONTH,
-        DateTimePeriod::QUARTER,
-        DateTimePeriod::HALFYEAR,
-        DateTimePeriod::YEAR,
-        DateTimePeriod::DECADE,
-    } );
+    std::vector<DateTimePeriod> allPeriods;
+
+    for ( size_t i = 0; i < DateTimePeriodEnum::size(); i++ )
+    {
+        allPeriods.push_back( DateTimePeriodEnum::fromIndex( i ) );
+    }
+
+    return allPeriods;
 }
 
 //--------------------------------------------------------------------------------------------------
 ///
 //--------------------------------------------------------------------------------------------------
-QString RiaQDateTimeTools::dateTimePeriodName( DateTimePeriod period )
+QString RiaQDateTimeTools::dateTimePeriodName( RiaQDateTimeTools::DateTimePeriod period )
 {
-    switch ( period )
-    {
-        case DateTimePeriod::DAY:
-            return TIMESPAN_DAY_NAME;
-        case DateTimePeriod::WEEK:
-            return TIMESPAN_WEEK_NAME;
-        case DateTimePeriod::MONTH:
-            return TIMESPAN_MONTH_NAME;
-        case DateTimePeriod::QUARTER:
-            return TIMESPAN_QUARTER_NAME;
-        case DateTimePeriod::HALFYEAR:
-            return TIMESPAN_HALFYEAR_NAME;
-        case DateTimePeriod::YEAR:
-            return TIMESPAN_YEAR_NAME;
-        case DateTimePeriod::DECADE:
-            return TIMESPAN_DECADE_NAME;
-        default:
-            return "None";
-    }
+    return DateTimePeriodEnum::uiText( period );
 }
 
 //--------------------------------------------------------------------------------------------------
diff --git a/ApplicationCode/Application/Tools/RiaQDateTimeTools.h b/ApplicationCode/Application/Tools/RiaQDateTimeTools.h
index 2df6edca80..6a5053e20b 100644
--- a/ApplicationCode/Application/Tools/RiaQDateTimeTools.h
+++ b/ApplicationCode/Application/Tools/RiaQDateTimeTools.h
@@ -18,6 +18,8 @@
 
 #pragma once
 
+#include "cafAppEnum.h"
+
 #include <qglobal.h>
 #include <qnamespace.h>
 
@@ -40,21 +42,6 @@ namespace caf
 class PdmOptionItemInfo;
 };
 
-//==================================================================================================
-//
-//==================================================================================================
-enum class DateTimePeriod
-{
-    NONE = -1,
-    DAY,
-    WEEK,
-    MONTH,
-    QUARTER,
-    HALFYEAR,
-    YEAR,
-    DECADE
-};
-
 //==================================================================================================
 //
 //==================================================================================================
@@ -90,13 +77,18 @@ public:
         TIME_FORMAT_SIZE
     };
 
-    static const QString TIMESPAN_DAY_NAME;
-    static const QString TIMESPAN_WEEK_NAME;
-    static const QString TIMESPAN_MONTH_NAME;
-    static const QString TIMESPAN_QUARTER_NAME;
-    static const QString TIMESPAN_HALFYEAR_NAME;
-    static const QString TIMESPAN_YEAR_NAME;
-    static const QString TIMESPAN_DECADE_NAME;
+    enum class DateTimePeriod
+    {
+        NONE = -1,
+        DAY,
+        WEEK,
+        MONTH,
+        QUARTER,
+        HALFYEAR,
+        YEAR,
+        DECADE
+    };
+    using DateTimePeriodEnum = caf::AppEnum<DateTimePeriod>;
 
     static Qt::TimeSpec currentTimeSpec();
 
@@ -109,8 +101,8 @@ public:
     static QDateTime addYears( const QDateTime& dt, double years );
     static QDateTime addSpan( const QDateTime& dt, DateTimeSpan span );
     static QDateTime subtractSpan( const QDateTime& dt, DateTimeSpan span );
-    static QDateTime addPeriod( const QDateTime& dt, DateTimePeriod period );
-    static QDateTime subtractPeriod( const QDateTime& dt, DateTimePeriod period );
+    static QDateTime addPeriod( const QDateTime& dt, RiaQDateTimeTools::DateTimePeriod period );
+    static QDateTime subtractPeriod( const QDateTime& dt, RiaQDateTimeTools::DateTimePeriod period );
 
     static QDateTime epoch();
 
@@ -121,11 +113,11 @@ public:
 
     static bool lessThan( const QDateTime& dt1, const QDateTime& dt2 );
 
-    static const DateTimeSpan timeSpan( DateTimePeriod period );
-    static QDateTime          truncateTime( const QDateTime& dt, DateTimePeriod period );
+    static const DateTimeSpan timeSpan( RiaQDateTimeTools::DateTimePeriod period );
+    static QDateTime          truncateTime( const QDateTime& dt, RiaQDateTimeTools::DateTimePeriod period );
 
-    static std::vector<DateTimePeriod> dateTimePeriods();
-    static QString                     dateTimePeriodName( DateTimePeriod period );
+    static std::vector<RiaQDateTimeTools::DateTimePeriod> dateTimePeriods();
+    static QString                     dateTimePeriodName( RiaQDateTimeTools::DateTimePeriod period );
 
     // This function uses C locale to make sure the text representation of a date is stable, independent of the locale
     // settings on local machine. Required for stable regression testing.
diff --git a/ApplicationCode/Application/Tools/RiaTimeHistoryCurveResampler.cpp b/ApplicationCode/Application/Tools/RiaTimeHistoryCurveResampler.cpp
index 28400bf6c0..6e0a2733bd 100644
--- a/ApplicationCode/Application/Tools/RiaTimeHistoryCurveResampler.cpp
+++ b/ApplicationCode/Application/Tools/RiaTimeHistoryCurveResampler.cpp
@@ -67,7 +67,7 @@ void RiaTimeHistoryCurveResampler::setCurveData( const std::vector<double>& valu
 //--------------------------------------------------------------------------------------------------
 ///
 //--------------------------------------------------------------------------------------------------
-void RiaTimeHistoryCurveResampler::resampleAndComputePeriodEndValues( DateTimePeriod period )
+void RiaTimeHistoryCurveResampler::resampleAndComputePeriodEndValues( RiaQDateTimeTools::DateTimePeriod period )
 {
     computePeriodEndValues( period );
 }
@@ -75,7 +75,7 @@ void RiaTimeHistoryCurveResampler::resampleAndComputePeriodEndValues( DateTimePe
 //--------------------------------------------------------------------------------------------------
 ///
 //--------------------------------------------------------------------------------------------------
-void RiaTimeHistoryCurveResampler::resampleAndComputeWeightedMeanValues( DateTimePeriod period )
+void RiaTimeHistoryCurveResampler::resampleAndComputeWeightedMeanValues( RiaQDateTimeTools::DateTimePeriod period )
 {
     computeWeightedMeanValues( period );
 }
@@ -99,8 +99,9 @@ const std::vector<double>& RiaTimeHistoryCurveResampler::resampledValues() const
 //--------------------------------------------------------------------------------------------------
 ///
 //--------------------------------------------------------------------------------------------------
-std::vector<time_t>
-    RiaTimeHistoryCurveResampler::timeStepsFromTimeRange( DateTimePeriod period, time_t minTime, time_t maxTime )
+std::vector<time_t> RiaTimeHistoryCurveResampler::timeStepsFromTimeRange( RiaQDateTimeTools::DateTimePeriod period,
+                                                                          time_t                            minTime,
+                                                                          time_t                            maxTime )
 {
     if ( minTime > maxTime ) return std::vector<time_t>();
 
@@ -123,7 +124,7 @@ std::vector<time_t>
 //--------------------------------------------------------------------------------------------------
 ///
 //--------------------------------------------------------------------------------------------------
-void RiaTimeHistoryCurveResampler::computeWeightedMeanValues( DateTimePeriod period )
+void RiaTimeHistoryCurveResampler::computeWeightedMeanValues( RiaQDateTimeTools::DateTimePeriod period )
 {
     size_t      origDataSize  = m_originalValues.second.size();
     size_t      oi            = 0;
@@ -196,7 +197,7 @@ void RiaTimeHistoryCurveResampler::computeWeightedMeanValues( DateTimePeriod per
 //--------------------------------------------------------------------------------------------------
 ///
 //--------------------------------------------------------------------------------------------------
-void RiaTimeHistoryCurveResampler::computePeriodEndValues( DateTimePeriod period )
+void RiaTimeHistoryCurveResampler::computePeriodEndValues( RiaQDateTimeTools::DateTimePeriod period )
 {
     size_t      origDataSize  = m_originalValues.second.size();
     size_t      oi            = 0;
@@ -245,9 +246,9 @@ void RiaTimeHistoryCurveResampler::clearData()
 //--------------------------------------------------------------------------------------------------
 ///
 //--------------------------------------------------------------------------------------------------
-void RiaTimeHistoryCurveResampler::computeResampledTimeSteps( DateTimePeriod period )
+void RiaTimeHistoryCurveResampler::computeResampledTimeSteps( RiaQDateTimeTools::DateTimePeriod period )
 {
-    CVF_ASSERT( period != DateTimePeriod::NONE && m_originalValues.second.size() > 0 );
+    CVF_ASSERT( period != RiaQDateTimeTools::DateTimePeriod::NONE && m_originalValues.second.size() > 0 );
 
     auto firstOriginalTimeStep = QDT::fromTime_t( m_originalValues.second.front() );
     auto lastOriginalTimeStep  = QDT::fromTime_t( m_originalValues.second.back() );
@@ -268,7 +269,8 @@ void RiaTimeHistoryCurveResampler::computeResampledTimeSteps( DateTimePeriod per
 //--------------------------------------------------------------------------------------------------
 ///
 //--------------------------------------------------------------------------------------------------
-QDateTime RiaTimeHistoryCurveResampler::firstResampledTimeStep( const QDateTime& firstTimeStep, DateTimePeriod period )
+QDateTime RiaTimeHistoryCurveResampler::firstResampledTimeStep( const QDateTime&                  firstTimeStep,
+                                                                RiaQDateTimeTools::DateTimePeriod period )
 {
     QDateTime truncatedTime = QDT::truncateTime( firstTimeStep, period );
 
diff --git a/ApplicationCode/Application/Tools/RiaTimeHistoryCurveResampler.h b/ApplicationCode/Application/Tools/RiaTimeHistoryCurveResampler.h
index d6ec197a46..e917aadec7 100644
--- a/ApplicationCode/Application/Tools/RiaTimeHistoryCurveResampler.h
+++ b/ApplicationCode/Application/Tools/RiaTimeHistoryCurveResampler.h
@@ -35,21 +35,22 @@ public:
 
     void setCurveData( const std::vector<double>& values, const std::vector<time_t>& timeSteps );
 
-    void resampleAndComputePeriodEndValues( DateTimePeriod period );
-    void resampleAndComputeWeightedMeanValues( DateTimePeriod period );
+    void resampleAndComputePeriodEndValues( RiaQDateTimeTools::DateTimePeriod period );
+    void resampleAndComputeWeightedMeanValues( RiaQDateTimeTools::DateTimePeriod period );
 
     const std::vector<time_t>& resampledTimeSteps() const;
     const std::vector<double>& resampledValues() const;
 
-    static std::vector<time_t> timeStepsFromTimeRange( DateTimePeriod period, time_t minTime, time_t maxTime );
+    static std::vector<time_t>
+        timeStepsFromTimeRange( RiaQDateTimeTools::DateTimePeriod period, time_t minTime, time_t maxTime );
 
 private:
-    void computeWeightedMeanValues( DateTimePeriod period );
-    void computePeriodEndValues( DateTimePeriod period );
+    void computeWeightedMeanValues( RiaQDateTimeTools::DateTimePeriod period );
+    void computePeriodEndValues( RiaQDateTimeTools::DateTimePeriod period );
 
     void             clearData();
-    void             computeResampledTimeSteps( DateTimePeriod period );
-    static QDateTime firstResampledTimeStep( const QDateTime& firstTimestep, DateTimePeriod period );
+    void             computeResampledTimeSteps( RiaQDateTimeTools::DateTimePeriod period );
+    static QDateTime firstResampledTimeStep( const QDateTime& firstTimestep, RiaQDateTimeTools::DateTimePeriod period );
     inline double    interpolatedValue( time_t t, time_t t1, double v1, time_t t2, double v2 );
 
 private:
diff --git a/ApplicationCode/Commands/ApplicationCommands/RicShowPlotDataFeature.cpp b/ApplicationCode/Commands/ApplicationCommands/RicShowPlotDataFeature.cpp
index bf499e59b3..d32567fa73 100644
--- a/ApplicationCode/Commands/ApplicationCommands/RicShowPlotDataFeature.cpp
+++ b/ApplicationCode/Commands/ApplicationCommands/RicShowPlotDataFeature.cpp
@@ -63,8 +63,8 @@ public:
     {
         auto allTabs = tabs();
         CVF_ASSERT( tabIndex < (int)allTabs.size() );
-        DateTimePeriod timePeriod = allTabs[tabIndex];
-        if ( timePeriod == DateTimePeriod::NONE )
+        RiaQDateTimeTools::DateTimePeriod timePeriod = allTabs[tabIndex];
+        if ( timePeriod == RiaQDateTimeTools::DateTimePeriod::NONE )
         {
             return "No Resampling";
         }
@@ -78,7 +78,7 @@ public:
     {
         CVF_ASSERT( m_summaryPlot.notNull() && "Need to check that provider is valid" );
 
-        DateTimePeriod timePeriod = indexToPeriod( tabIndex );
+        RiaQDateTimeTools::DateTimePeriod timePeriod = indexToPeriod( tabIndex );
 
         if ( m_summaryPlot->containsResamplableCurves() )
         {
@@ -88,25 +88,25 @@ public:
         }
         else
         {
-            return m_summaryPlot->asciiDataForSummaryPlotExport( DateTimePeriod::NONE, true );
+            return m_summaryPlot->asciiDataForSummaryPlotExport( RiaQDateTimeTools::DateTimePeriod::NONE, true );
         }
     }
 
     int tabCount() const override { return (int)tabs().size(); }
 
 private:
-    static DateTimePeriod indexToPeriod( int tabIndex )
+    static RiaQDateTimeTools::DateTimePeriod indexToPeriod( int tabIndex )
     {
         auto allTabs = tabs();
         CVF_ASSERT( tabIndex < (int)allTabs.size() );
-        DateTimePeriod timePeriod = allTabs[tabIndex];
+        RiaQDateTimeTools::DateTimePeriod timePeriod = allTabs[tabIndex];
         return timePeriod;
     }
 
-    static std::vector<DateTimePeriod> tabs()
+    static std::vector<RiaQDateTimeTools::DateTimePeriod> tabs()
     {
-        std::vector<DateTimePeriod> dateTimePeriods = RiaQDateTimeTools::dateTimePeriods();
-        dateTimePeriods.erase( std::remove( dateTimePeriods.begin(), dateTimePeriods.end(), DateTimePeriod::DECADE ),
+        std::vector<RiaQDateTimeTools::DateTimePeriod> dateTimePeriods = RiaQDateTimeTools::dateTimePeriods();
+        dateTimePeriods.erase( std::remove( dateTimePeriods.begin(), dateTimePeriods.end(), RiaQDateTimeTools::DateTimePeriod::DECADE ),
                                dateTimePeriods.end() );
         return dateTimePeriods;
     }
diff --git a/ApplicationCode/Commands/RicResampleDialog.cpp b/ApplicationCode/Commands/RicResampleDialog.cpp
index ef8646bea4..d4ef02b774 100644
--- a/ApplicationCode/Commands/RicResampleDialog.cpp
+++ b/ApplicationCode/Commands/RicResampleDialog.cpp
@@ -104,12 +104,13 @@ RicResampleDialogResult RicResampleDialog::openDialog( QWidget* parent /*= 0*/,
 //--------------------------------------------------------------------------------------------------
 ///
 //--------------------------------------------------------------------------------------------------
-void RicResampleDialog::setPeriodOptions( const std::vector<DateTimePeriod>& dateTimePeriods )
+void RicResampleDialog::setPeriodOptions( const std::vector<RiaQDateTimeTools::DateTimePeriod>& dateTimePeriods )
 {
     QStringList s;
     for ( auto& period : dateTimePeriods )
     {
-        QString text = period != DateTimePeriod::NONE ? RiaQDateTimeTools::dateTimePeriodName( period ) : "No Resampling";
+        QString text = period != RiaQDateTimeTools::DateTimePeriod::NONE ? RiaQDateTimeTools::dateTimePeriodName( period )
+                                                                         : "No Resampling";
         m_timePeriodCombo->addItem( text, QVariant( (int)period ) );
     }
 }
@@ -117,10 +118,10 @@ void RicResampleDialog::setPeriodOptions( const std::vector<DateTimePeriod>& dat
 //--------------------------------------------------------------------------------------------------
 ///
 //--------------------------------------------------------------------------------------------------
-DateTimePeriod RicResampleDialog::selectedDateTimePeriod() const
+RiaQDateTimeTools::DateTimePeriod RicResampleDialog::selectedDateTimePeriod() const
 {
     int currIndex = m_timePeriodCombo->currentIndex();
-    return (DateTimePeriod)m_timePeriodCombo->itemData( currIndex ).toInt();
+    return (RiaQDateTimeTools::DateTimePeriod)m_timePeriodCombo->itemData( currIndex ).toInt();
 }
 
 //--------------------------------------------------------------------------------------------------
diff --git a/ApplicationCode/Commands/RicResampleDialog.h b/ApplicationCode/Commands/RicResampleDialog.h
index 8c9fc20314..8feb1068e7 100644
--- a/ApplicationCode/Commands/RicResampleDialog.h
+++ b/ApplicationCode/Commands/RicResampleDialog.h
@@ -49,8 +49,8 @@ public:
     static RicResampleDialogResult openDialog( QWidget* parent = nullptr, const QString& caption = QString() );
 
 private:
-    void           setPeriodOptions( const std::vector<DateTimePeriod>& dateTimePeriods );
-    DateTimePeriod selectedDateTimePeriod() const;
+    void setPeriodOptions( const std::vector<RiaQDateTimeTools::DateTimePeriod>& dateTimePeriods );
+    RiaQDateTimeTools::DateTimePeriod selectedDateTimePeriod() const;
 
 private slots:
     void slotDialogOkClicked();
@@ -69,12 +69,12 @@ private:
 class RicResampleDialogResult
 {
 public:
-    RicResampleDialogResult( bool ok, DateTimePeriod period )
+    RicResampleDialogResult( bool ok, RiaQDateTimeTools::DateTimePeriod period )
         : ok( ok )
         , period( period )
     {
     }
 
-    bool           ok;
-    DateTimePeriod period;
-};
\ No newline at end of file
+    bool                              ok;
+    RiaQDateTimeTools::DateTimePeriod period;
+};
diff --git a/ApplicationCode/Commands/SummaryPlotCommands/RicAsciiExportSummaryPlotFeature.cpp b/ApplicationCode/Commands/SummaryPlotCommands/RicAsciiExportSummaryPlotFeature.cpp
index c5ac5efb9e..403acaf41f 100644
--- a/ApplicationCode/Commands/SummaryPlotCommands/RicAsciiExportSummaryPlotFeature.cpp
+++ b/ApplicationCode/Commands/SummaryPlotCommands/RicAsciiExportSummaryPlotFeature.cpp
@@ -172,7 +172,7 @@ bool RicAsciiExportSummaryPlotFeature::exportTextToFile( const QString& fileName
 //--------------------------------------------------------------------------------------------------
 bool RicAsciiExportSummaryPlotFeature::exportAsciiForSummaryPlot( const QString&        fileName,
                                                                   const RimSummaryPlot* summaryPlot,
-                                                                  DateTimePeriod        resamplingPeriod,
+                                                                  RiaQDateTimeTools::DateTimePeriod        resamplingPeriod,
                                                                   bool                  showTimeAsLongString )
 {
     QString text = summaryPlot->description();
diff --git a/ApplicationCode/Commands/SummaryPlotCommands/RicAsciiExportSummaryPlotFeature.h b/ApplicationCode/Commands/SummaryPlotCommands/RicAsciiExportSummaryPlotFeature.h
index 14eae43e52..ea571e2ea4 100644
--- a/ApplicationCode/Commands/SummaryPlotCommands/RicAsciiExportSummaryPlotFeature.h
+++ b/ApplicationCode/Commands/SummaryPlotCommands/RicAsciiExportSummaryPlotFeature.h
@@ -44,6 +44,6 @@ protected:
 private:
     static bool exportAsciiForSummaryPlot( const QString&        fileName,
                                            const RimSummaryPlot* selectedSummaryPlots,
-                                           DateTimePeriod        resamplingPeriod,
+                                           RiaQDateTimeTools::DateTimePeriod        resamplingPeriod,
                                            bool                  showTimeAsLongString );
 };
diff --git a/ApplicationCode/ProjectDataModel/RimSimWellInViewTools.cpp b/ApplicationCode/ProjectDataModel/RimSimWellInViewTools.cpp
index 4f8caf83f4..f1653fb54c 100644
--- a/ApplicationCode/ProjectDataModel/RimSimWellInViewTools.cpp
+++ b/ApplicationCode/ProjectDataModel/RimSimWellInViewTools.cpp
@@ -174,11 +174,11 @@ double RimSimWellInViewTools::extractValueForTimeStep( RifSummaryReaderInterface
     resampler.setCurveData( values, timeSteps );
     if ( RiaSummaryTools::hasAccumulatedData( addr ) )
     {
-        resampler.resampleAndComputePeriodEndValues( DateTimePeriod::DAY );
+        resampler.resampleAndComputePeriodEndValues( RiaQDateTimeTools::DateTimePeriod::DAY );
     }
     else
     {
-        resampler.resampleAndComputeWeightedMeanValues( DateTimePeriod::DAY );
+        resampler.resampleAndComputeWeightedMeanValues( RiaQDateTimeTools::DateTimePeriod::DAY );
     }
 
     // Find the data point which best matches the selected time step
diff --git a/ApplicationCode/ProjectDataModel/Summary/RimEnsembleStatisticsCase.cpp b/ApplicationCode/ProjectDataModel/Summary/RimEnsembleStatisticsCase.cpp
index e4fbcb82ef..d3dee5f4d1 100644
--- a/ApplicationCode/ProjectDataModel/Summary/RimEnsembleStatisticsCase.cpp
+++ b/ApplicationCode/ProjectDataModel/Summary/RimEnsembleStatisticsCase.cpp
@@ -160,9 +160,9 @@ void RimEnsembleStatisticsCase::calculate( const std::vector<RimSummaryCase*> su
             RiaTimeHistoryCurveResampler resampler;
             resampler.setCurveData( values, timeSteps );
             if ( RiaSummaryTools::hasAccumulatedData( inputAddress ) )
-                resampler.resampleAndComputePeriodEndValues( DateTimePeriod::DAY );
+                resampler.resampleAndComputePeriodEndValues( RiaQDateTimeTools::DateTimePeriod::DAY );
             else
-                resampler.resampleAndComputeWeightedMeanValues( DateTimePeriod::DAY );
+                resampler.resampleAndComputeWeightedMeanValues( RiaQDateTimeTools::DateTimePeriod::DAY );
 
             if ( allTimeSteps.empty() ) allTimeSteps = resampler.resampledTimeSteps();
             caseAndTimeStepValues.push_back(
diff --git a/ApplicationCode/ProjectDataModel/Summary/RimSummaryPlot.cpp b/ApplicationCode/ProjectDataModel/Summary/RimSummaryPlot.cpp
index 8ef70d76fd..af31f70d44 100644
--- a/ApplicationCode/ProjectDataModel/Summary/RimSummaryPlot.cpp
+++ b/ApplicationCode/ProjectDataModel/Summary/RimSummaryPlot.cpp
@@ -99,18 +99,18 @@ class CurvesData
 {
 public:
     CurvesData()
-        : resamplePeriod( DateTimePeriod::NONE )
+        : resamplePeriod( RiaQDateTimeTools::DateTimePeriod::NONE )
     {
     }
     void clear()
     {
-        resamplePeriod = DateTimePeriod::NONE;
+        resamplePeriod = RiaQDateTimeTools::DateTimePeriod::NONE;
         caseNames.clear();
         timeSteps.clear();
         allCurveData.clear();
     }
 
-    DateTimePeriod                      resamplePeriod;
+    RiaQDateTimeTools::DateTimePeriod   resamplePeriod;
     std::vector<QString>                caseNames;
     std::vector<std::vector<time_t>>    timeSteps;
     std::vector<std::vector<CurveData>> allCurveData;
@@ -129,10 +129,10 @@ void populateSummaryCurvesData( std::vector<RimSummaryCurve*> curves, SummaryCur
 void populateTimeHistoryCurvesData( std::vector<RimGridTimeHistoryCurve*> curves, CurvesData* curvesData );
 void populateAsciiDataCurvesData( std::vector<RimAsciiDataCurve*> curves, CurvesData* curvesData );
 
-void prepareCaseCurvesForExport( DateTimePeriod    period,
-                                 ResampleAlgorithm algorithm,
-                                 const CurvesData& inputCurvesData,
-                                 CurvesData*       resultCurvesData );
+void prepareCaseCurvesForExport( RiaQDateTimeTools::DateTimePeriod period,
+                                 ResampleAlgorithm                 algorithm,
+                                 const CurvesData&                 inputCurvesData,
+                                 CurvesData*                       resultCurvesData );
 
 void       appendToExportDataForCase( QString& out, const std::vector<time_t>& timeSteps, const std::vector<CurveData>& curveData );
 void       appendToExportData( QString& out, const std::vector<CurvesData>& curvesData, bool showTimeAsLongString );
@@ -335,13 +335,14 @@ RiuQwtPlotWidget* RimSummaryPlot::viewer()
 //--------------------------------------------------------------------------------------------------
 QString RimSummaryPlot::asciiDataForPlotExport() const
 {
-    return asciiDataForSummaryPlotExport( DateTimePeriod::YEAR, false );
+    return asciiDataForSummaryPlotExport( RiaQDateTimeTools::DateTimePeriod::YEAR, false );
 }
 
 //--------------------------------------------------------------------------------------------------
 ///
 //--------------------------------------------------------------------------------------------------
-QString RimSummaryPlot::asciiDataForSummaryPlotExport( DateTimePeriod resamplingPeriod, bool showTimeAsLongString ) const
+QString RimSummaryPlot::asciiDataForSummaryPlotExport( RiaQDateTimeTools::DateTimePeriod resamplingPeriod,
+                                                       bool                              showTimeAsLongString ) const
 {
     QString                      out;
     RiaTimeHistoryCurveResampler resampler;
@@ -2187,16 +2188,16 @@ void populateSummaryCurvesData( std::vector<RimSummaryCurve*> curves, SummaryCur
 //--------------------------------------------------------------------------------------------------
 ///
 //--------------------------------------------------------------------------------------------------
-void prepareCaseCurvesForExport( DateTimePeriod    period,
-                                 ResampleAlgorithm algorithm,
-                                 const CurvesData& inputCurvesData,
-                                 CurvesData*       resultCurvesData )
+void prepareCaseCurvesForExport( RiaQDateTimeTools::DateTimePeriod period,
+                                 ResampleAlgorithm                 algorithm,
+                                 const CurvesData&                 inputCurvesData,
+                                 CurvesData*                       resultCurvesData )
 {
     RiaTimeHistoryCurveResampler resampler;
 
     resultCurvesData->clear();
 
-    if ( period != DateTimePeriod::NONE )
+    if ( period != RiaQDateTimeTools::DateTimePeriod::NONE )
     {
         // Prepare result data
         resultCurvesData->resamplePeriod = period;
@@ -2278,7 +2279,7 @@ void appendToExportData( QString& out, const std::vector<CurvesData>& curvesData
 {
     CurvesData data = concatCurvesData( curvesData );
 
-    if ( data.resamplePeriod != DateTimePeriod::NONE )
+    if ( data.resamplePeriod != RiaQDateTimeTools::DateTimePeriod::NONE )
     {
         time_t minTimeStep = std::numeric_limits<time_t>::max();
         time_t maxTimeStep = 0;
@@ -2330,40 +2331,40 @@ void appendToExportData( QString& out, const std::vector<CurvesData>& curvesData
                 {
                     default:
                         // Fall through to NONE
-                    case DateTimePeriod::NONE:
+                    case RiaQDateTimeTools::DateTimePeriod::NONE:
                         timeText = timseStepUtc.toString( "yyyy-MM-dd hh:mm:ss " );
                         break;
-                    case DateTimePeriod::DAY:
+                    case RiaQDateTimeTools::DateTimePeriod::DAY:
                         timeText = oneDayEarlier.toString( "yyyy-MM-dd " );
                         break;
-                    case DateTimePeriod::WEEK:
+                    case RiaQDateTimeTools::DateTimePeriod::WEEK:
                     {
                         timeText       = oneDayEarlier.toString( "yyyy" );
                         int weekNumber = oneDayEarlier.date().weekNumber();
                         timeText += QString( "-W%1" ).arg( weekNumber, 2, 10, zeroChar );
                         break;
                     }
-                    case DateTimePeriod::MONTH:
+                    case RiaQDateTimeTools::DateTimePeriod::MONTH:
                         timeText = oneDayEarlier.toString( "yyyy-MM" );
                         break;
-                    case DateTimePeriod::QUARTER:
+                    case RiaQDateTimeTools::DateTimePeriod::QUARTER:
                     {
                         int quarterNumber = oneDayEarlier.date().month() / 3;
                         timeText          = oneDayEarlier.toString( "yyyy" );
                         timeText += QString( "-Q%1" ).arg( quarterNumber );
                         break;
                     }
-                    case DateTimePeriod::HALFYEAR:
+                    case RiaQDateTimeTools::DateTimePeriod::HALFYEAR:
                     {
                         int halfYearNumber = oneDayEarlier.date().month() / 6;
                         timeText           = oneDayEarlier.toString( "yyyy" );
                         timeText += QString( "-H%1" ).arg( halfYearNumber );
                         break;
                     }
-                    case DateTimePeriod::YEAR:
+                    case RiaQDateTimeTools::DateTimePeriod::YEAR:
                         timeText = oneDayEarlier.toString( "yyyy" );
                         break;
-                    case DateTimePeriod::DECADE:
+                    case RiaQDateTimeTools::DateTimePeriod::DECADE:
                         timeText = oneDayEarlier.toString( "yyyy" );
                         break;
                 }
@@ -2419,8 +2420,8 @@ CurvesData concatCurvesData( const std::vector<CurvesData>& curvesData )
 {
     CVF_ASSERT( !curvesData.empty() );
 
-    DateTimePeriod period = curvesData.front().resamplePeriod;
-    CurvesData     resultCurvesData;
+    RiaQDateTimeTools::DateTimePeriod period = curvesData.front().resamplePeriod;
+    CurvesData                        resultCurvesData;
 
     resultCurvesData.resamplePeriod = period;
 
diff --git a/ApplicationCode/ProjectDataModel/Summary/RimSummaryPlot.h b/ApplicationCode/ProjectDataModel/Summary/RimSummaryPlot.h
index 2e498a44ec..73a3ea4a66 100644
--- a/ApplicationCode/ProjectDataModel/Summary/RimSummaryPlot.h
+++ b/ApplicationCode/ProjectDataModel/Summary/RimSummaryPlot.h
@@ -116,7 +116,8 @@ public:
     RiuQwtPlotWidget* viewer() override;
 
     QString asciiDataForPlotExport() const override;
-    QString asciiDataForSummaryPlotExport( DateTimePeriod resamplingPeriod, bool showTimeAsLongString ) const;
+    QString asciiDataForSummaryPlotExport( RiaQDateTimeTools::DateTimePeriod resamplingPeriod,
+                                           bool                              showTimeAsLongString ) const;
 
     std::vector<RimSummaryCurve*>       summaryAndEnsembleCurves() const;
     std::set<RiaSummaryCurveDefinition> summaryAndEnsembleCurveDefinitions() const;
diff --git a/ApplicationCode/ProjectDataModelCommands/RimcSummaryCase.cpp b/ApplicationCode/ProjectDataModelCommands/RimcSummaryCase.cpp
index 141a49f2e3..2f3016e2fc 100644
--- a/ApplicationCode/ProjectDataModelCommands/RimcSummaryCase.cpp
+++ b/ApplicationCode/ProjectDataModelCommands/RimcSummaryCase.cpp
@@ -216,44 +216,14 @@ caf::PdmObjectHandle* RimcSummaryCase_ResampleValues::execute()
     auto adr = RifEclipseSummaryAddress::fromEclipseTextAddress( m_addressString().toStdString() );
 
     std::vector<double> values;
-    bool                isOk = sumReader->values( adr, &values );
+
+    bool isOk = sumReader->values( adr, &values );
     if ( !isOk ) return nullptr;
 
-    auto           timeValues = sumReader->timeSteps( adr );
-    DateTimePeriod period     = DateTimePeriod::NONE;
+    auto timeValues = sumReader->timeSteps( adr );
 
-    {
-        QString periodString = m_resamplingPeriod().trimmed();
-
-        if ( periodString.compare( RiaQDateTimeTools::TIMESPAN_DAY_NAME, Qt::CaseInsensitive ) == 0 )
-        {
-            period = DateTimePeriod::DAY;
-        }
-        else if ( periodString.compare( RiaQDateTimeTools::TIMESPAN_WEEK_NAME, Qt::CaseInsensitive ) == 0 )
-        {
-            period = DateTimePeriod::WEEK;
-        }
-        else if ( periodString.compare( RiaQDateTimeTools::TIMESPAN_MONTH_NAME, Qt::CaseInsensitive ) == 0 )
-        {
-            period = DateTimePeriod::MONTH;
-        }
-        else if ( periodString.compare( RiaQDateTimeTools::TIMESPAN_QUARTER_NAME, Qt::CaseInsensitive ) == 0 )
-        {
-            period = DateTimePeriod::QUARTER;
-        }
-        else if ( periodString.compare( RiaQDateTimeTools::TIMESPAN_HALFYEAR_NAME, Qt::CaseInsensitive ) == 0 )
-        {
-            period = DateTimePeriod::HALFYEAR;
-        }
-        else if ( periodString.compare( RiaQDateTimeTools::TIMESPAN_YEAR_NAME, Qt::CaseInsensitive ) == 0 )
-        {
-            period = DateTimePeriod::YEAR;
-        }
-        else if ( periodString.compare( RiaQDateTimeTools::TIMESPAN_DECADE_NAME, Qt::CaseInsensitive ) == 0 )
-        {
-            period = DateTimePeriod::DECADE;
-        }
-    }
+    QString                           periodString = m_resamplingPeriod().trimmed();
+    RiaQDateTimeTools::DateTimePeriod period       = RiaQDateTimeTools::DateTimePeriodEnum::fromText( periodString );
 
     RiaTimeHistoryCurveResampler resampler;
     resampler.setCurveData( values, timeValues );
diff --git a/ApplicationCode/UnitTests/RiaTimeHistoryCurveTools-Test.cpp b/ApplicationCode/UnitTests/RiaTimeHistoryCurveTools-Test.cpp
index bc4ee87e7c..1fc347d941 100644
--- a/ApplicationCode/UnitTests/RiaTimeHistoryCurveTools-Test.cpp
+++ b/ApplicationCode/UnitTests/RiaTimeHistoryCurveTools-Test.cpp
@@ -35,7 +35,7 @@ TEST( RiaTimeHistoryCurveResampler, Test_Resampling_NoPeriod )
 
     RiaTimeHistoryCurveResampler resampler;
     resampler.setCurveData( dataValues, toTime_tVector( timeStrings ) );
-    resampler.resampleAndComputeWeightedMeanValues( DateTimePeriod::MONTH );
+    resampler.resampleAndComputeWeightedMeanValues( RiaQDateTimeTools::DateTimePeriod::MONTH );
 
     EXPECT_EQ( 1, (int)resampler.resampledTimeSteps().size() );
     EXPECT_EQ( toTime_t( "2018-03-01" ), resampler.resampledTimeSteps()[0] );
@@ -52,7 +52,7 @@ TEST( RiaTimeHistoryCurveResampler, Test_Resampling_Decade )
 
     RiaTimeHistoryCurveResampler resampler;
     resampler.setCurveData( dataValues, toTime_tVector( timeStrings ) );
-    resampler.resampleAndComputeWeightedMeanValues( DateTimePeriod::DECADE );
+    resampler.resampleAndComputeWeightedMeanValues( RiaQDateTimeTools::DateTimePeriod::DECADE );
 
     EXPECT_EQ( 4, (int)resampler.resampledTimeSteps().size() );
     EXPECT_EQ( toTime_t( "1990-01-01" ), resampler.resampledTimeSteps()[0] );
@@ -72,7 +72,7 @@ TEST( RiaTimeHistoryCurveResampler, Test_Resampling_Year )
 
     RiaTimeHistoryCurveResampler resampler;
     resampler.setCurveData( dataValues, toTime_tVector( timeStrings ) );
-    resampler.resampleAndComputeWeightedMeanValues( DateTimePeriod::YEAR );
+    resampler.resampleAndComputeWeightedMeanValues( RiaQDateTimeTools::DateTimePeriod::YEAR );
 
     EXPECT_EQ( 5, (int)resampler.resampledTimeSteps().size() );
     EXPECT_EQ( toTime_t( "2015-01-01" ), resampler.resampledTimeSteps()[0] );
@@ -93,7 +93,7 @@ TEST( RiaTimeHistoryCurveResampler, Test_Resampling_HalfYear )
 
     RiaTimeHistoryCurveResampler resampler;
     resampler.setCurveData( dataValues, toTime_tVector( timeStrings ) );
-    resampler.resampleAndComputeWeightedMeanValues( DateTimePeriod::HALFYEAR );
+    resampler.resampleAndComputeWeightedMeanValues( RiaQDateTimeTools::DateTimePeriod::HALFYEAR );
 
     EXPECT_EQ( 5, (int)resampler.resampledTimeSteps().size() );
     EXPECT_EQ( toTime_t( "2016-07-01" ), resampler.resampledTimeSteps()[0] );
@@ -114,7 +114,7 @@ TEST( RiaTimeHistoryCurveResampler, Test_Resampling_Quarter )
 
     RiaTimeHistoryCurveResampler resampler;
     resampler.setCurveData( dataValues, toTime_tVector( timeStrings ) );
-    resampler.resampleAndComputeWeightedMeanValues( DateTimePeriod::QUARTER );
+    resampler.resampleAndComputeWeightedMeanValues( RiaQDateTimeTools::DateTimePeriod::QUARTER );
 
     EXPECT_EQ( 7, (int)resampler.resampledTimeSteps().size() );
     EXPECT_EQ( toTime_t( "2016-10-01" ), resampler.resampledTimeSteps()[0] );
@@ -137,7 +137,7 @@ TEST( RiaTimeHistoryCurveResampler, Test_Resampling_Month )
 
     RiaTimeHistoryCurveResampler resampler;
     resampler.setCurveData( dataValues, toTime_tVector( timeStrings ) );
-    resampler.resampleAndComputeWeightedMeanValues( DateTimePeriod::MONTH );
+    resampler.resampleAndComputeWeightedMeanValues( RiaQDateTimeTools::DateTimePeriod::MONTH );
 
     EXPECT_EQ( 6, (int)resampler.resampledTimeSteps().size() );
     EXPECT_EQ( toTime_t( "2017-10-01" ), resampler.resampledTimeSteps()[0] );
@@ -159,7 +159,7 @@ TEST( RiaTimeHistoryCurveResampler, Test_Resampling_Week )
 
     RiaTimeHistoryCurveResampler resampler;
     resampler.setCurveData( dataValues, toTime_tVector( timeStrings ) );
-    resampler.resampleAndComputeWeightedMeanValues( DateTimePeriod::WEEK );
+    resampler.resampleAndComputeWeightedMeanValues( RiaQDateTimeTools::DateTimePeriod::WEEK );
 
     EXPECT_EQ( 10, (int)resampler.resampledTimeSteps().size() );
     EXPECT_EQ( toTime_t( "2017-11-06" ), resampler.resampledTimeSteps()[0] );
@@ -185,7 +185,7 @@ TEST( RiaTimeHistoryCurveResampler, Test_Resampling_NoSampleCrossingPeriodBounda
 
     RiaTimeHistoryCurveResampler resampler;
     resampler.setCurveData( dataValues, toTime_tVector( timeStrings ) );
-    resampler.resampleAndComputeWeightedMeanValues( DateTimePeriod::YEAR );
+    resampler.resampleAndComputeWeightedMeanValues( RiaQDateTimeTools::DateTimePeriod::YEAR );
 
     EXPECT_EQ( 1, (int)resampler.resampledTimeSteps().size() );
     EXPECT_EQ( toTime_t( "2018-01-01" ), resampler.resampledTimeSteps()[0] );
@@ -202,7 +202,7 @@ TEST( RiaTimeHistoryCurveResampler, Test_WeightedMean_SingleSample )
 
     RiaTimeHistoryCurveResampler resampler;
     resampler.setCurveData( dataValues, toTime_tVector( timeStrings ) );
-    resampler.resampleAndComputeWeightedMeanValues( DateTimePeriod::MONTH );
+    resampler.resampleAndComputeWeightedMeanValues( RiaQDateTimeTools::DateTimePeriod::MONTH );
 
     EXPECT_EQ( 1, (int)resampler.resampledTimeSteps().size() );
     EXPECT_EQ( toTime_t( "2018-03-01" ), resampler.resampledTimeSteps()[0] );
@@ -222,7 +222,7 @@ TEST( RiaTimeHistoryCurveResampler, Test_WeightedMean_Days )
 
     RiaTimeHistoryCurveResampler resampler;
     resampler.setCurveData( dataValues, toTime_tVector( timeStrings ) );
-    resampler.resampleAndComputeWeightedMeanValues( DateTimePeriod::DAY );
+    resampler.resampleAndComputeWeightedMeanValues( RiaQDateTimeTools::DateTimePeriod::DAY );
 
     EXPECT_EQ( 5, (int)resampler.resampledTimeSteps().size() );
     EXPECT_EQ( toTime_t( "2018-02-03" ), resampler.resampledTimeSteps()[0] );
@@ -256,7 +256,7 @@ TEST( RiaTimeHistoryCurveResampler, Test_WeightedMean_Decade )
 
     RiaTimeHistoryCurveResampler resampler;
     resampler.setCurveData( dataValues, toTime_tVector( timeStrings ) );
-    resampler.resampleAndComputeWeightedMeanValues( DateTimePeriod::DECADE );
+    resampler.resampleAndComputeWeightedMeanValues( RiaQDateTimeTools::DateTimePeriod::DECADE );
 
     EXPECT_EQ( 3, (int)resampler.resampledTimeSteps().size() );
     EXPECT_EQ( tp0, resampler.resampledTimeSteps()[0] );
@@ -287,7 +287,7 @@ TEST( RiaTimeHistoryCurveResampler, Test_WeightedMean_SamplesStartBeforePeriod )
 
     RiaTimeHistoryCurveResampler resampler;
     resampler.setCurveData( dataValues, toTime_tVector( timeStrings ) );
-    resampler.resampleAndComputeWeightedMeanValues( DateTimePeriod::MONTH );
+    resampler.resampleAndComputeWeightedMeanValues( RiaQDateTimeTools::DateTimePeriod::MONTH );
 
     EXPECT_EQ( 3, (int)resampler.resampledTimeSteps().size() );
     EXPECT_EQ( tp0, resampler.resampledTimeSteps()[0] );
@@ -320,7 +320,7 @@ TEST( RiaTimeHistoryCurveResampler, Test_WeightedMean_SamplesStartBeforePeriod_T
 
     RiaTimeHistoryCurveResampler resampler;
     resampler.setCurveData( dataValues, toTime_tVector( timeStrings ) );
-    resampler.resampleAndComputeWeightedMeanValues( DateTimePeriod::MONTH );
+    resampler.resampleAndComputeWeightedMeanValues( RiaQDateTimeTools::DateTimePeriod::MONTH );
 
     EXPECT_EQ( 3, (int)resampler.resampledTimeSteps().size() );
     EXPECT_EQ( tp0, resampler.resampledTimeSteps()[0] );
@@ -349,7 +349,7 @@ TEST( RiaTimeHistoryCurveResampler, Test_WeightedMean_SamplesStartAndEndMatchPer
 
     RiaTimeHistoryCurveResampler resampler;
     resampler.setCurveData( dataValues, toTime_tVector( timeStrings ) );
-    resampler.resampleAndComputeWeightedMeanValues( DateTimePeriod::MONTH );
+    resampler.resampleAndComputeWeightedMeanValues( RiaQDateTimeTools::DateTimePeriod::MONTH );
 
     EXPECT_EQ( 2, (int)resampler.resampledTimeSteps().size() );
     EXPECT_EQ( toTime_t( "2018-02-01" ), resampler.resampledTimeSteps().front() );
@@ -379,7 +379,7 @@ TEST( RiaTimeHistoryCurveResampler, Test_WeightedMean_SamplesStartMatchPeriodSta
 
     RiaTimeHistoryCurveResampler resampler;
     resampler.setCurveData( dataValues, toTime_tVector( timeStrings ) );
-    resampler.resampleAndComputeWeightedMeanValues( DateTimePeriod::MONTH );
+    resampler.resampleAndComputeWeightedMeanValues( RiaQDateTimeTools::DateTimePeriod::MONTH );
 
     EXPECT_EQ( 3, (int)resampler.resampledTimeSteps().size() );
     EXPECT_EQ( tp0, resampler.resampledTimeSteps()[0] );
@@ -409,7 +409,7 @@ TEST( RiaTimeHistoryCurveResampler, Test_WeightedMean_MultipleSamplesInLastPerio
 
     RiaTimeHistoryCurveResampler resampler;
     resampler.setCurveData( dataValues, toTime_tVector( timeStrings ) );
-    resampler.resampleAndComputeWeightedMeanValues( DateTimePeriod::MONTH );
+    resampler.resampleAndComputeWeightedMeanValues( RiaQDateTimeTools::DateTimePeriod::MONTH );
 
     EXPECT_EQ( 2, (int)resampler.resampledTimeSteps().size() );
     EXPECT_EQ( tp0, resampler.resampledTimeSteps()[0] );
@@ -433,7 +433,7 @@ TEST( RiaTimeHistoryCurveResampler, Test_PeriodEndValues_SingleSample )
 
     RiaTimeHistoryCurveResampler resampler;
     resampler.setCurveData( dataValues, toTime_tVector( timeStrings ) );
-    resampler.resampleAndComputePeriodEndValues( DateTimePeriod::MONTH );
+    resampler.resampleAndComputePeriodEndValues( RiaQDateTimeTools::DateTimePeriod::MONTH );
 
     EXPECT_EQ( 1, (int)resampler.resampledTimeSteps().size() );
     EXPECT_EQ( toTime_t( "2018-03-01" ), resampler.resampledTimeSteps()[0] );
@@ -459,7 +459,7 @@ TEST( RiaTimeHistoryCurveResampler, Test_PeriodEndValues_SamplesStartBeforePerio
 
     RiaTimeHistoryCurveResampler resampler;
     resampler.setCurveData( dataValues, toTime_tVector( timeStrings ) );
-    resampler.resampleAndComputePeriodEndValues( DateTimePeriod::MONTH );
+    resampler.resampleAndComputePeriodEndValues( RiaQDateTimeTools::DateTimePeriod::MONTH );
 
     EXPECT_EQ( 3, (int)resampler.resampledTimeSteps().size() );
     EXPECT_EQ( tp0, resampler.resampledTimeSteps()[0] );
@@ -486,7 +486,7 @@ TEST( RiaTimeHistoryCurveResampler, Test_PeriodEndValues_SamplesStartMatchPeriod
 
     RiaTimeHistoryCurveResampler resampler;
     resampler.setCurveData( dataValues, toTime_tVector( timeStrings ) );
-    resampler.resampleAndComputePeriodEndValues( DateTimePeriod::MONTH );
+    resampler.resampleAndComputePeriodEndValues( RiaQDateTimeTools::DateTimePeriod::MONTH );
 
     EXPECT_EQ( 3, (int)resampler.resampledTimeSteps().size() );
     EXPECT_EQ( toTime_t( "2018-02-01" ), resampler.resampledTimeSteps()[0] );
@@ -509,7 +509,7 @@ TEST( RiaTimeHistoryCurveResampler, Test_PeriodEndValues_SamplesStartAndEndMatch
 
     RiaTimeHistoryCurveResampler resampler;
     resampler.setCurveData( dataValues, toTime_tVector( timeStrings ) );
-    resampler.resampleAndComputePeriodEndValues( DateTimePeriod::MONTH );
+    resampler.resampleAndComputePeriodEndValues( RiaQDateTimeTools::DateTimePeriod::MONTH );
 
     EXPECT_EQ( 2, (int)resampler.resampledTimeSteps().size() );
     EXPECT_EQ( toTime_t( "2018-02-01" ), resampler.resampledTimeSteps().front() );