diff --git a/src/CalcViewModel/Common/TraceLogger.cpp b/src/CalcViewModel/Common/TraceLogger.cpp
index 47ee1279..7df8be27 100644
--- a/src/CalcViewModel/Common/TraceLogger.cpp
+++ b/src/CalcViewModel/Common/TraceLogger.cpp
@@ -76,6 +76,7 @@ namespace CalculatorApp
     constexpr auto EVENT_NAME_CORE_WINDOW_WAS_NULL = L"CoreWindowWasNull";
 
     constexpr auto EVENT_NAME_MODE_CHANGED = L"ModeChanged";
+    constexpr auto EVENT_NAME_DATE_CALCULATION_MODE_USED = L"DateCalculationModeUsed";
 
     constexpr auto EVENT_NAME_EXCEPTION = L"Exception";
 
@@ -919,6 +920,15 @@ namespace CalculatorApp
         }
     }
 
+    void TraceLogger::LogDateCalculationModeUsed(bool AddSubtractMode)
+    {
+        LoggingFields fields{};
+        fields.AddBoolean(L"CalculationType", AddSubtractMode);
+        // cast mode to an int for telemetry
+        fields.AddInt32(L"CalcMode", NavCategory::Serialize(ViewMode::Date));
+        LogLevel2Event(EVENT_NAME_DATE_CALCULATION_MODE_USED, fields);
+    }
+
     void TraceLogger::LogDateDifferenceModeUsed(int windowId)
     {
         if (!m_dateDiffUsageLoggedInSession)
diff --git a/src/CalcViewModel/Common/TraceLogger.h b/src/CalcViewModel/Common/TraceLogger.h
index 627d888d..84b7a425 100644
--- a/src/CalcViewModel/Common/TraceLogger.h
+++ b/src/CalcViewModel/Common/TraceLogger.h
@@ -77,6 +77,7 @@ namespace CalculatorApp
         void LogRadixButtonUsed(int windowId);
         void LogAngleButtonUsed(int windowId);
         void LogHypButtonUsed(int windowId);
+        void LogDateCalculationModeUsed(bool AddSubtractMode);
         void LogNewWindowCreationBegin(int windowId);
         void LogNewWindowCreationEnd(int windowId);
         void LogError(std::wstring_view errorString);
diff --git a/src/Calculator/Views/DateCalculator.xaml.cpp b/src/Calculator/Views/DateCalculator.xaml.cpp
index b3a9dcdd..141d65cb 100644
--- a/src/Calculator/Views/DateCalculator.xaml.cpp
+++ b/src/Calculator/Views/DateCalculator.xaml.cpp
@@ -104,6 +104,7 @@ void DateCalculator::FromDate_DateChanged(_In_ CalendarDatePicker ^ sender, _In_
         auto dateCalcViewModel = safe_cast<DateCalculatorViewModel ^>(this->DataContext);
         dateCalcViewModel->FromDate = e->NewDate->Value;
         TraceLogger::GetInstance().LogDateDifferenceModeUsed(ApplicationView::GetApplicationViewIdForWindow(CoreWindow::GetForCurrentThread()));
+        TraceLogger::GetInstance().LogDateCalculationModeUsed(false /* AddSubtractMode */);
     }
     else
     {
@@ -118,6 +119,7 @@ void DateCalculator::ToDate_DateChanged(_In_ CalendarDatePicker ^ sender, _In_ C
         auto dateCalcViewModel = safe_cast<DateCalculatorViewModel ^>(this->DataContext);
         dateCalcViewModel->ToDate = e->NewDate->Value;
         TraceLogger::GetInstance().LogDateDifferenceModeUsed(ApplicationView::GetApplicationViewIdForWindow(CoreWindow::GetForCurrentThread()));
+        TraceLogger::GetInstance().LogDateCalculationModeUsed(false /* AddSubtractMode */);
     }
     else
     {
@@ -133,6 +135,7 @@ void DateCalculator::AddSubtract_DateChanged(_In_ CalendarDatePicker ^ sender, _
         dateCalcViewModel->StartDate = e->NewDate->Value;
         TraceLogger::GetInstance().LogDateAddSubtractModeUsed(
             ApplicationView::GetApplicationViewIdForWindow(CoreWindow::GetForCurrentThread()), dateCalcViewModel->IsAddMode);
+        TraceLogger::GetInstance().LogDateCalculationModeUsed(true /* AddSubtractMode */);
     }
     else
     {
@@ -145,6 +148,11 @@ void CalculatorApp::DateCalculator::OffsetValue_Changed(_In_ Platform::Object ^
     auto dateCalcViewModel = safe_cast<DateCalculatorViewModel ^>(this->DataContext);
     TraceLogger::GetInstance().LogDateAddSubtractModeUsed(
         ApplicationView::GetApplicationViewIdForWindow(CoreWindow::GetForCurrentThread()), dateCalcViewModel->IsAddMode);
+    // do not log telemetry for no-ops and initialization of combo boxes
+    if (dateCalcViewModel->DaysOffset != 0 || dateCalcViewModel->MonthsOffset != 0 || dateCalcViewModel->YearsOffset != 0)
+    {
+        TraceLogger::GetInstance().LogDateCalculationModeUsed(true /* AddSubtractMode */);
+    }
 }
 
 void DateCalculator::OnCopyMenuItemClicked(_In_ Object ^ sender, _In_ RoutedEventArgs ^ e)