diff --git a/scaddins/source/analysis/analysis.cxx b/scaddins/source/analysis/analysis.cxx
index 81e12782a320..570d4e355261 100644
--- a/scaddins/source/analysis/analysis.cxx
+++ b/scaddins/source/analysis/analysis.cxx
@@ -407,7 +407,8 @@ sal_Int32 SAL_CALL AnalysisAddIn::getWeeknum( const uno::Reference< beans::XProp
     DaysToDate( nDate, nDay, nMonth, nYear );
 
     sal_Int32   nFirstInYear = DateToDays( 1, 1, nYear );
-    sal_Int16   nFirstDayInYear = GetDayOfWeek( nFirstInYear );
+    // coverity[ tainted_data_return : FALSE ] version 2023.12.2
+    sal_uInt16  nFirstDayInYear = GetDayOfWeek( nFirstInYear );
 
     return ( nDate - nFirstInYear + ( ( nMode == 1 )? ( nFirstDayInYear + 1 ) % 7 : nFirstDayInYear ) ) / 7 + 1;
 }
diff --git a/scaddins/source/analysis/analysishelper.hxx b/scaddins/source/analysis/analysishelper.hxx
index fdb5d4a7994a..0fdae29ccd66 100644
--- a/scaddins/source/analysis/analysishelper.hxx
+++ b/scaddins/source/analysis/analysishelper.hxx
@@ -580,7 +580,6 @@ inline sal_Int32 GetDiffDate360( const css::uno::Reference< css::beans::XPropert
 
 inline sal_Int16 GetDayOfWeek( sal_Int32 n )
 {   // monday = 0, ..., sunday = 6
-    assert(n >= 0);
     return static_cast< sal_Int16 >( ( n - 1 ) % 7 );
 }
 
diff --git a/sw/source/filter/ww8/writerwordglue.cxx b/sw/source/filter/ww8/writerwordglue.cxx
index e2c76cfaf257..1f3fa03fd962 100644
--- a/sw/source/filter/ww8/writerwordglue.cxx
+++ b/sw/source/filter/ww8/writerwordglue.cxx
@@ -744,6 +744,7 @@ namespace sw
 
             if ( rDT.GetDate() == 0 )
                 return 0;
+            // coverity[ tainted_data_return : FALSE ] version 2023.12.2
             sal_uInt32 nDT = ( rDT.GetDayOfWeek() + 1 ) % 7;
             nDT <<= 9;
             nDT += ( rDT.GetYear() - 1900 ) & 0x1ff;
diff --git a/tools/source/datetime/tdate.cxx b/tools/source/datetime/tdate.cxx
index 03ec18e6f394..3548f08f06f8 100644
--- a/tools/source/datetime/tdate.cxx
+++ b/tools/source/datetime/tdate.cxx
@@ -209,9 +209,8 @@ sal_uInt16 Date::GetDayOfYear() const
 sal_uInt16 Date::GetWeekOfYear( DayOfWeek eStartDay,
                                 sal_Int16 nMinimumNumberOfDaysInWeek ) const
 {
-    short nWeek;
+    // coverity[ tainted_data_return : FALSE ] version 2023.12.2
     short n1WDay = static_cast<short>(Date( 1, 1, GetYear() ).GetDayOfWeek());
-    assert(n1WDay >= 0);
     short nDayOfYear = static_cast<short>(GetDayOfYear());
 
     // weekdays start at 0, thus decrement one
@@ -225,6 +224,7 @@ sal_uInt16 Date::GetWeekOfYear( DayOfWeek eStartDay,
         nMinimumNumberOfDaysInWeek = 4;
     }
 
+    short nWeek;
     if ( nMinimumNumberOfDaysInWeek == 1 )
     {
         nWeek = ((n1WDay+nDayOfYear)/7) + 1;