diff --git a/modules/openapi-generator/src/main/resources/csharp/libraries/generichost/DateOnlyJsonConverter.mustache b/modules/openapi-generator/src/main/resources/csharp/libraries/generichost/DateOnlyJsonConverter.mustache
index 1441421aa299..94388357c0bd 100644
--- a/modules/openapi-generator/src/main/resources/csharp/libraries/generichost/DateOnlyJsonConverter.mustache
+++ b/modules/openapi-generator/src/main/resources/csharp/libraries/generichost/DateOnlyJsonConverter.mustache
@@ -34,7 +34,7 @@ namespace {{packageName}}.{{clientPackage}}
             string value = reader.GetString(){{nrt!}};
 
             foreach(string format in Formats)
-                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.AdjustToUniversal | DateTimeStyles.AssumeUniversal, out DateOnly result))
+                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.None, out DateOnly result))
                     return result;
 
             throw new NotSupportedException();
diff --git a/modules/openapi-generator/src/main/resources/csharp/libraries/generichost/DateOnlyNullableJsonConverter.mustache b/modules/openapi-generator/src/main/resources/csharp/libraries/generichost/DateOnlyNullableJsonConverter.mustache
index 53fdfbee7534..11e0de144780 100644
--- a/modules/openapi-generator/src/main/resources/csharp/libraries/generichost/DateOnlyNullableJsonConverter.mustache
+++ b/modules/openapi-generator/src/main/resources/csharp/libraries/generichost/DateOnlyNullableJsonConverter.mustache
@@ -34,7 +34,7 @@ namespace {{packageName}}.{{clientPackage}}
             string value = reader.GetString(){{nrt!}};
 
             foreach(string format in Formats)
-                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.AdjustToUniversal | DateTimeStyles.AssumeUniversal, out DateOnly result))
+                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.None, out DateOnly result))
                     return result;
 
             throw new NotSupportedException();
diff --git a/samples/client/petstore/csharp/generichost/latest/ComposedEnum/src/Org.OpenAPITools/Client/DateOnlyJsonConverter.cs b/samples/client/petstore/csharp/generichost/latest/ComposedEnum/src/Org.OpenAPITools/Client/DateOnlyJsonConverter.cs
index fbbfa1bc4561..acf239fbeda9 100644
--- a/samples/client/petstore/csharp/generichost/latest/ComposedEnum/src/Org.OpenAPITools/Client/DateOnlyJsonConverter.cs
+++ b/samples/client/petstore/csharp/generichost/latest/ComposedEnum/src/Org.OpenAPITools/Client/DateOnlyJsonConverter.cs
@@ -43,7 +43,7 @@ public override DateOnly Read(ref Utf8JsonReader reader, Type typeToConvert, Jso
             string value = reader.GetString()!;
 
             foreach(string format in Formats)
-                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.AdjustToUniversal | DateTimeStyles.AssumeUniversal, out DateOnly result))
+                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.None, out DateOnly result))
                     return result;
 
             throw new NotSupportedException();
diff --git a/samples/client/petstore/csharp/generichost/latest/ComposedEnum/src/Org.OpenAPITools/Client/DateOnlyNullableJsonConverter.cs b/samples/client/petstore/csharp/generichost/latest/ComposedEnum/src/Org.OpenAPITools/Client/DateOnlyNullableJsonConverter.cs
index 781bae3e4967..e69101609208 100644
--- a/samples/client/petstore/csharp/generichost/latest/ComposedEnum/src/Org.OpenAPITools/Client/DateOnlyNullableJsonConverter.cs
+++ b/samples/client/petstore/csharp/generichost/latest/ComposedEnum/src/Org.OpenAPITools/Client/DateOnlyNullableJsonConverter.cs
@@ -43,7 +43,7 @@ public class DateOnlyNullableJsonConverter : JsonConverter<DateOnly?>
             string value = reader.GetString()!;
 
             foreach(string format in Formats)
-                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.AdjustToUniversal | DateTimeStyles.AssumeUniversal, out DateOnly result))
+                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.None, out DateOnly result))
                     return result;
 
             throw new NotSupportedException();
diff --git a/samples/client/petstore/csharp/generichost/latest/HelloWorld/src/Org.OpenAPITools/Client/DateOnlyJsonConverter.cs b/samples/client/petstore/csharp/generichost/latest/HelloWorld/src/Org.OpenAPITools/Client/DateOnlyJsonConverter.cs
index 63be8509932f..f45d5c1fed8c 100644
--- a/samples/client/petstore/csharp/generichost/latest/HelloWorld/src/Org.OpenAPITools/Client/DateOnlyJsonConverter.cs
+++ b/samples/client/petstore/csharp/generichost/latest/HelloWorld/src/Org.OpenAPITools/Client/DateOnlyJsonConverter.cs
@@ -43,7 +43,7 @@ public override DateOnly Read(ref Utf8JsonReader reader, Type typeToConvert, Jso
             string value = reader.GetString()!;
 
             foreach(string format in Formats)
-                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.AdjustToUniversal | DateTimeStyles.AssumeUniversal, out DateOnly result))
+                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.None, out DateOnly result))
                     return result;
 
             throw new NotSupportedException();
diff --git a/samples/client/petstore/csharp/generichost/latest/HelloWorld/src/Org.OpenAPITools/Client/DateOnlyNullableJsonConverter.cs b/samples/client/petstore/csharp/generichost/latest/HelloWorld/src/Org.OpenAPITools/Client/DateOnlyNullableJsonConverter.cs
index 0a3ee74c97f9..597cf6574325 100644
--- a/samples/client/petstore/csharp/generichost/latest/HelloWorld/src/Org.OpenAPITools/Client/DateOnlyNullableJsonConverter.cs
+++ b/samples/client/petstore/csharp/generichost/latest/HelloWorld/src/Org.OpenAPITools/Client/DateOnlyNullableJsonConverter.cs
@@ -43,7 +43,7 @@ public class DateOnlyNullableJsonConverter : JsonConverter<DateOnly?>
             string value = reader.GetString()!;
 
             foreach(string format in Formats)
-                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.AdjustToUniversal | DateTimeStyles.AssumeUniversal, out DateOnly result))
+                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.None, out DateOnly result))
                     return result;
 
             throw new NotSupportedException();
diff --git a/samples/client/petstore/csharp/generichost/latest/InlineEnumAnyOf/src/Org.OpenAPITools/Client/DateOnlyJsonConverter.cs b/samples/client/petstore/csharp/generichost/latest/InlineEnumAnyOf/src/Org.OpenAPITools/Client/DateOnlyJsonConverter.cs
index c9dc766e4639..04b243233ad5 100644
--- a/samples/client/petstore/csharp/generichost/latest/InlineEnumAnyOf/src/Org.OpenAPITools/Client/DateOnlyJsonConverter.cs
+++ b/samples/client/petstore/csharp/generichost/latest/InlineEnumAnyOf/src/Org.OpenAPITools/Client/DateOnlyJsonConverter.cs
@@ -43,7 +43,7 @@ public override DateOnly Read(ref Utf8JsonReader reader, Type typeToConvert, Jso
             string value = reader.GetString()!;
 
             foreach(string format in Formats)
-                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.AdjustToUniversal | DateTimeStyles.AssumeUniversal, out DateOnly result))
+                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.None, out DateOnly result))
                     return result;
 
             throw new NotSupportedException();
diff --git a/samples/client/petstore/csharp/generichost/latest/InlineEnumAnyOf/src/Org.OpenAPITools/Client/DateOnlyNullableJsonConverter.cs b/samples/client/petstore/csharp/generichost/latest/InlineEnumAnyOf/src/Org.OpenAPITools/Client/DateOnlyNullableJsonConverter.cs
index 5e42c9efb856..79a84687d295 100644
--- a/samples/client/petstore/csharp/generichost/latest/InlineEnumAnyOf/src/Org.OpenAPITools/Client/DateOnlyNullableJsonConverter.cs
+++ b/samples/client/petstore/csharp/generichost/latest/InlineEnumAnyOf/src/Org.OpenAPITools/Client/DateOnlyNullableJsonConverter.cs
@@ -43,7 +43,7 @@ public class DateOnlyNullableJsonConverter : JsonConverter<DateOnly?>
             string value = reader.GetString()!;
 
             foreach(string format in Formats)
-                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.AdjustToUniversal | DateTimeStyles.AssumeUniversal, out DateOnly result))
+                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.None, out DateOnly result))
                     return result;
 
             throw new NotSupportedException();
diff --git a/samples/client/petstore/csharp/generichost/latest/OneOfList/src/Org.OpenAPITools/Client/DateOnlyJsonConverter.cs b/samples/client/petstore/csharp/generichost/latest/OneOfList/src/Org.OpenAPITools/Client/DateOnlyJsonConverter.cs
index 2e5274b1543d..67c131639b6b 100644
--- a/samples/client/petstore/csharp/generichost/latest/OneOfList/src/Org.OpenAPITools/Client/DateOnlyJsonConverter.cs
+++ b/samples/client/petstore/csharp/generichost/latest/OneOfList/src/Org.OpenAPITools/Client/DateOnlyJsonConverter.cs
@@ -43,7 +43,7 @@ public override DateOnly Read(ref Utf8JsonReader reader, Type typeToConvert, Jso
             string value = reader.GetString()!;
 
             foreach(string format in Formats)
-                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.AdjustToUniversal | DateTimeStyles.AssumeUniversal, out DateOnly result))
+                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.None, out DateOnly result))
                     return result;
 
             throw new NotSupportedException();
diff --git a/samples/client/petstore/csharp/generichost/latest/OneOfList/src/Org.OpenAPITools/Client/DateOnlyNullableJsonConverter.cs b/samples/client/petstore/csharp/generichost/latest/OneOfList/src/Org.OpenAPITools/Client/DateOnlyNullableJsonConverter.cs
index 0481f4f135c6..5958ab9a6c19 100644
--- a/samples/client/petstore/csharp/generichost/latest/OneOfList/src/Org.OpenAPITools/Client/DateOnlyNullableJsonConverter.cs
+++ b/samples/client/petstore/csharp/generichost/latest/OneOfList/src/Org.OpenAPITools/Client/DateOnlyNullableJsonConverter.cs
@@ -43,7 +43,7 @@ public class DateOnlyNullableJsonConverter : JsonConverter<DateOnly?>
             string value = reader.GetString()!;
 
             foreach(string format in Formats)
-                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.AdjustToUniversal | DateTimeStyles.AssumeUniversal, out DateOnly result))
+                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.None, out DateOnly result))
                     return result;
 
             throw new NotSupportedException();
diff --git a/samples/client/petstore/csharp/generichost/latest/Tags/src/Org.OpenAPITools/Client/DateOnlyJsonConverter.cs b/samples/client/petstore/csharp/generichost/latest/Tags/src/Org.OpenAPITools/Client/DateOnlyJsonConverter.cs
index 2e5bda82ea8f..9102de63f421 100644
--- a/samples/client/petstore/csharp/generichost/latest/Tags/src/Org.OpenAPITools/Client/DateOnlyJsonConverter.cs
+++ b/samples/client/petstore/csharp/generichost/latest/Tags/src/Org.OpenAPITools/Client/DateOnlyJsonConverter.cs
@@ -44,7 +44,7 @@ public override DateOnly Read(ref Utf8JsonReader reader, Type typeToConvert, Jso
             string value = reader.GetString()!;
 
             foreach(string format in Formats)
-                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.AdjustToUniversal | DateTimeStyles.AssumeUniversal, out DateOnly result))
+                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.None, out DateOnly result))
                     return result;
 
             throw new NotSupportedException();
diff --git a/samples/client/petstore/csharp/generichost/latest/Tags/src/Org.OpenAPITools/Client/DateOnlyNullableJsonConverter.cs b/samples/client/petstore/csharp/generichost/latest/Tags/src/Org.OpenAPITools/Client/DateOnlyNullableJsonConverter.cs
index 0ced717f3e38..fe89342ba7db 100644
--- a/samples/client/petstore/csharp/generichost/latest/Tags/src/Org.OpenAPITools/Client/DateOnlyNullableJsonConverter.cs
+++ b/samples/client/petstore/csharp/generichost/latest/Tags/src/Org.OpenAPITools/Client/DateOnlyNullableJsonConverter.cs
@@ -44,7 +44,7 @@ public class DateOnlyNullableJsonConverter : JsonConverter<DateOnly?>
             string value = reader.GetString()!;
 
             foreach(string format in Formats)
-                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.AdjustToUniversal | DateTimeStyles.AssumeUniversal, out DateOnly result))
+                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.None, out DateOnly result))
                     return result;
 
             throw new NotSupportedException();
diff --git a/samples/client/petstore/csharp/generichost/net8/AllOf/src/Org.OpenAPITools/Client/DateOnlyJsonConverter.cs b/samples/client/petstore/csharp/generichost/net8/AllOf/src/Org.OpenAPITools/Client/DateOnlyJsonConverter.cs
index f7fe93629939..671c407f55a0 100644
--- a/samples/client/petstore/csharp/generichost/net8/AllOf/src/Org.OpenAPITools/Client/DateOnlyJsonConverter.cs
+++ b/samples/client/petstore/csharp/generichost/net8/AllOf/src/Org.OpenAPITools/Client/DateOnlyJsonConverter.cs
@@ -43,7 +43,7 @@ public override DateOnly Read(ref Utf8JsonReader reader, Type typeToConvert, Jso
             string value = reader.GetString()!;
 
             foreach(string format in Formats)
-                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.AdjustToUniversal | DateTimeStyles.AssumeUniversal, out DateOnly result))
+                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.None, out DateOnly result))
                     return result;
 
             throw new NotSupportedException();
diff --git a/samples/client/petstore/csharp/generichost/net8/AllOf/src/Org.OpenAPITools/Client/DateOnlyNullableJsonConverter.cs b/samples/client/petstore/csharp/generichost/net8/AllOf/src/Org.OpenAPITools/Client/DateOnlyNullableJsonConverter.cs
index a5cb490f3ef1..ae9a253b5aa1 100644
--- a/samples/client/petstore/csharp/generichost/net8/AllOf/src/Org.OpenAPITools/Client/DateOnlyNullableJsonConverter.cs
+++ b/samples/client/petstore/csharp/generichost/net8/AllOf/src/Org.OpenAPITools/Client/DateOnlyNullableJsonConverter.cs
@@ -43,7 +43,7 @@ public class DateOnlyNullableJsonConverter : JsonConverter<DateOnly?>
             string value = reader.GetString()!;
 
             foreach(string format in Formats)
-                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.AdjustToUniversal | DateTimeStyles.AssumeUniversal, out DateOnly result))
+                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.None, out DateOnly result))
                     return result;
 
             throw new NotSupportedException();
diff --git a/samples/client/petstore/csharp/generichost/net8/AnyOf/src/Org.OpenAPITools/Client/DateOnlyJsonConverter.cs b/samples/client/petstore/csharp/generichost/net8/AnyOf/src/Org.OpenAPITools/Client/DateOnlyJsonConverter.cs
index 5009ae5304f7..ddd26d4eafca 100644
--- a/samples/client/petstore/csharp/generichost/net8/AnyOf/src/Org.OpenAPITools/Client/DateOnlyJsonConverter.cs
+++ b/samples/client/petstore/csharp/generichost/net8/AnyOf/src/Org.OpenAPITools/Client/DateOnlyJsonConverter.cs
@@ -43,7 +43,7 @@ public override DateOnly Read(ref Utf8JsonReader reader, Type typeToConvert, Jso
             string value = reader.GetString()!;
 
             foreach(string format in Formats)
-                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.AdjustToUniversal | DateTimeStyles.AssumeUniversal, out DateOnly result))
+                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.None, out DateOnly result))
                     return result;
 
             throw new NotSupportedException();
diff --git a/samples/client/petstore/csharp/generichost/net8/AnyOf/src/Org.OpenAPITools/Client/DateOnlyNullableJsonConverter.cs b/samples/client/petstore/csharp/generichost/net8/AnyOf/src/Org.OpenAPITools/Client/DateOnlyNullableJsonConverter.cs
index 02dda463ab26..a4e9918e0aa5 100644
--- a/samples/client/petstore/csharp/generichost/net8/AnyOf/src/Org.OpenAPITools/Client/DateOnlyNullableJsonConverter.cs
+++ b/samples/client/petstore/csharp/generichost/net8/AnyOf/src/Org.OpenAPITools/Client/DateOnlyNullableJsonConverter.cs
@@ -43,7 +43,7 @@ public class DateOnlyNullableJsonConverter : JsonConverter<DateOnly?>
             string value = reader.GetString()!;
 
             foreach(string format in Formats)
-                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.AdjustToUniversal | DateTimeStyles.AssumeUniversal, out DateOnly result))
+                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.None, out DateOnly result))
                     return result;
 
             throw new NotSupportedException();
diff --git a/samples/client/petstore/csharp/generichost/net8/AnyOfNoCompare/src/Org.OpenAPITools/Client/DateOnlyJsonConverter.cs b/samples/client/petstore/csharp/generichost/net8/AnyOfNoCompare/src/Org.OpenAPITools/Client/DateOnlyJsonConverter.cs
index 5009ae5304f7..ddd26d4eafca 100644
--- a/samples/client/petstore/csharp/generichost/net8/AnyOfNoCompare/src/Org.OpenAPITools/Client/DateOnlyJsonConverter.cs
+++ b/samples/client/petstore/csharp/generichost/net8/AnyOfNoCompare/src/Org.OpenAPITools/Client/DateOnlyJsonConverter.cs
@@ -43,7 +43,7 @@ public override DateOnly Read(ref Utf8JsonReader reader, Type typeToConvert, Jso
             string value = reader.GetString()!;
 
             foreach(string format in Formats)
-                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.AdjustToUniversal | DateTimeStyles.AssumeUniversal, out DateOnly result))
+                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.None, out DateOnly result))
                     return result;
 
             throw new NotSupportedException();
diff --git a/samples/client/petstore/csharp/generichost/net8/AnyOfNoCompare/src/Org.OpenAPITools/Client/DateOnlyNullableJsonConverter.cs b/samples/client/petstore/csharp/generichost/net8/AnyOfNoCompare/src/Org.OpenAPITools/Client/DateOnlyNullableJsonConverter.cs
index 02dda463ab26..a4e9918e0aa5 100644
--- a/samples/client/petstore/csharp/generichost/net8/AnyOfNoCompare/src/Org.OpenAPITools/Client/DateOnlyNullableJsonConverter.cs
+++ b/samples/client/petstore/csharp/generichost/net8/AnyOfNoCompare/src/Org.OpenAPITools/Client/DateOnlyNullableJsonConverter.cs
@@ -43,7 +43,7 @@ public class DateOnlyNullableJsonConverter : JsonConverter<DateOnly?>
             string value = reader.GetString()!;
 
             foreach(string format in Formats)
-                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.AdjustToUniversal | DateTimeStyles.AssumeUniversal, out DateOnly result))
+                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.None, out DateOnly result))
                     return result;
 
             throw new NotSupportedException();
diff --git a/samples/client/petstore/csharp/generichost/net8/FormModels/src/Org.OpenAPITools/Client/DateOnlyJsonConverter.cs b/samples/client/petstore/csharp/generichost/net8/FormModels/src/Org.OpenAPITools/Client/DateOnlyJsonConverter.cs
index 11b100056516..74dd3f152183 100644
--- a/samples/client/petstore/csharp/generichost/net8/FormModels/src/Org.OpenAPITools/Client/DateOnlyJsonConverter.cs
+++ b/samples/client/petstore/csharp/generichost/net8/FormModels/src/Org.OpenAPITools/Client/DateOnlyJsonConverter.cs
@@ -43,7 +43,7 @@ public override DateOnly Read(ref Utf8JsonReader reader, Type typeToConvert, Jso
             string value = reader.GetString();
 
             foreach(string format in Formats)
-                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.AdjustToUniversal | DateTimeStyles.AssumeUniversal, out DateOnly result))
+                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.None, out DateOnly result))
                     return result;
 
             throw new NotSupportedException();
diff --git a/samples/client/petstore/csharp/generichost/net8/FormModels/src/Org.OpenAPITools/Client/DateOnlyNullableJsonConverter.cs b/samples/client/petstore/csharp/generichost/net8/FormModels/src/Org.OpenAPITools/Client/DateOnlyNullableJsonConverter.cs
index 92ef8f6c92bf..e017a70ec492 100644
--- a/samples/client/petstore/csharp/generichost/net8/FormModels/src/Org.OpenAPITools/Client/DateOnlyNullableJsonConverter.cs
+++ b/samples/client/petstore/csharp/generichost/net8/FormModels/src/Org.OpenAPITools/Client/DateOnlyNullableJsonConverter.cs
@@ -43,7 +43,7 @@ public class DateOnlyNullableJsonConverter : JsonConverter<DateOnly?>
             string value = reader.GetString();
 
             foreach(string format in Formats)
-                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.AdjustToUniversal | DateTimeStyles.AssumeUniversal, out DateOnly result))
+                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.None, out DateOnly result))
                     return result;
 
             throw new NotSupportedException();
diff --git a/samples/client/petstore/csharp/generichost/net8/NullReferenceTypes/src/Org.OpenAPITools/Client/DateOnlyJsonConverter.cs b/samples/client/petstore/csharp/generichost/net8/NullReferenceTypes/src/Org.OpenAPITools/Client/DateOnlyJsonConverter.cs
index c9dc766e4639..04b243233ad5 100644
--- a/samples/client/petstore/csharp/generichost/net8/NullReferenceTypes/src/Org.OpenAPITools/Client/DateOnlyJsonConverter.cs
+++ b/samples/client/petstore/csharp/generichost/net8/NullReferenceTypes/src/Org.OpenAPITools/Client/DateOnlyJsonConverter.cs
@@ -43,7 +43,7 @@ public override DateOnly Read(ref Utf8JsonReader reader, Type typeToConvert, Jso
             string value = reader.GetString()!;
 
             foreach(string format in Formats)
-                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.AdjustToUniversal | DateTimeStyles.AssumeUniversal, out DateOnly result))
+                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.None, out DateOnly result))
                     return result;
 
             throw new NotSupportedException();
diff --git a/samples/client/petstore/csharp/generichost/net8/NullReferenceTypes/src/Org.OpenAPITools/Client/DateOnlyNullableJsonConverter.cs b/samples/client/petstore/csharp/generichost/net8/NullReferenceTypes/src/Org.OpenAPITools/Client/DateOnlyNullableJsonConverter.cs
index 5e42c9efb856..79a84687d295 100644
--- a/samples/client/petstore/csharp/generichost/net8/NullReferenceTypes/src/Org.OpenAPITools/Client/DateOnlyNullableJsonConverter.cs
+++ b/samples/client/petstore/csharp/generichost/net8/NullReferenceTypes/src/Org.OpenAPITools/Client/DateOnlyNullableJsonConverter.cs
@@ -43,7 +43,7 @@ public class DateOnlyNullableJsonConverter : JsonConverter<DateOnly?>
             string value = reader.GetString()!;
 
             foreach(string format in Formats)
-                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.AdjustToUniversal | DateTimeStyles.AssumeUniversal, out DateOnly result))
+                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.None, out DateOnly result))
                     return result;
 
             throw new NotSupportedException();
diff --git a/samples/client/petstore/csharp/generichost/net8/OneOf/src/Org.OpenAPITools/Client/DateOnlyJsonConverter.cs b/samples/client/petstore/csharp/generichost/net8/OneOf/src/Org.OpenAPITools/Client/DateOnlyJsonConverter.cs
index 5009ae5304f7..ddd26d4eafca 100644
--- a/samples/client/petstore/csharp/generichost/net8/OneOf/src/Org.OpenAPITools/Client/DateOnlyJsonConverter.cs
+++ b/samples/client/petstore/csharp/generichost/net8/OneOf/src/Org.OpenAPITools/Client/DateOnlyJsonConverter.cs
@@ -43,7 +43,7 @@ public override DateOnly Read(ref Utf8JsonReader reader, Type typeToConvert, Jso
             string value = reader.GetString()!;
 
             foreach(string format in Formats)
-                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.AdjustToUniversal | DateTimeStyles.AssumeUniversal, out DateOnly result))
+                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.None, out DateOnly result))
                     return result;
 
             throw new NotSupportedException();
diff --git a/samples/client/petstore/csharp/generichost/net8/OneOf/src/Org.OpenAPITools/Client/DateOnlyNullableJsonConverter.cs b/samples/client/petstore/csharp/generichost/net8/OneOf/src/Org.OpenAPITools/Client/DateOnlyNullableJsonConverter.cs
index 02dda463ab26..a4e9918e0aa5 100644
--- a/samples/client/petstore/csharp/generichost/net8/OneOf/src/Org.OpenAPITools/Client/DateOnlyNullableJsonConverter.cs
+++ b/samples/client/petstore/csharp/generichost/net8/OneOf/src/Org.OpenAPITools/Client/DateOnlyNullableJsonConverter.cs
@@ -43,7 +43,7 @@ public class DateOnlyNullableJsonConverter : JsonConverter<DateOnly?>
             string value = reader.GetString()!;
 
             foreach(string format in Formats)
-                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.AdjustToUniversal | DateTimeStyles.AssumeUniversal, out DateOnly result))
+                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.None, out DateOnly result))
                     return result;
 
             throw new NotSupportedException();
diff --git a/samples/client/petstore/csharp/generichost/net8/Petstore/src/Org.OpenAPITools/Client/DateOnlyJsonConverter.cs b/samples/client/petstore/csharp/generichost/net8/Petstore/src/Org.OpenAPITools/Client/DateOnlyJsonConverter.cs
index 11b100056516..74dd3f152183 100644
--- a/samples/client/petstore/csharp/generichost/net8/Petstore/src/Org.OpenAPITools/Client/DateOnlyJsonConverter.cs
+++ b/samples/client/petstore/csharp/generichost/net8/Petstore/src/Org.OpenAPITools/Client/DateOnlyJsonConverter.cs
@@ -43,7 +43,7 @@ public override DateOnly Read(ref Utf8JsonReader reader, Type typeToConvert, Jso
             string value = reader.GetString();
 
             foreach(string format in Formats)
-                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.AdjustToUniversal | DateTimeStyles.AssumeUniversal, out DateOnly result))
+                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.None, out DateOnly result))
                     return result;
 
             throw new NotSupportedException();
diff --git a/samples/client/petstore/csharp/generichost/net8/Petstore/src/Org.OpenAPITools/Client/DateOnlyNullableJsonConverter.cs b/samples/client/petstore/csharp/generichost/net8/Petstore/src/Org.OpenAPITools/Client/DateOnlyNullableJsonConverter.cs
index 92ef8f6c92bf..e017a70ec492 100644
--- a/samples/client/petstore/csharp/generichost/net8/Petstore/src/Org.OpenAPITools/Client/DateOnlyNullableJsonConverter.cs
+++ b/samples/client/petstore/csharp/generichost/net8/Petstore/src/Org.OpenAPITools/Client/DateOnlyNullableJsonConverter.cs
@@ -43,7 +43,7 @@ public class DateOnlyNullableJsonConverter : JsonConverter<DateOnly?>
             string value = reader.GetString();
 
             foreach(string format in Formats)
-                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.AdjustToUniversal | DateTimeStyles.AssumeUniversal, out DateOnly result))
+                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.None, out DateOnly result))
                     return result;
 
             throw new NotSupportedException();
diff --git a/samples/client/petstore/csharp/generichost/net8/SourceGeneration/src/Org.OpenAPITools/Client/DateOnlyJsonConverter.cs b/samples/client/petstore/csharp/generichost/net8/SourceGeneration/src/Org.OpenAPITools/Client/DateOnlyJsonConverter.cs
index c9dc766e4639..04b243233ad5 100644
--- a/samples/client/petstore/csharp/generichost/net8/SourceGeneration/src/Org.OpenAPITools/Client/DateOnlyJsonConverter.cs
+++ b/samples/client/petstore/csharp/generichost/net8/SourceGeneration/src/Org.OpenAPITools/Client/DateOnlyJsonConverter.cs
@@ -43,7 +43,7 @@ public override DateOnly Read(ref Utf8JsonReader reader, Type typeToConvert, Jso
             string value = reader.GetString()!;
 
             foreach(string format in Formats)
-                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.AdjustToUniversal | DateTimeStyles.AssumeUniversal, out DateOnly result))
+                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.None, out DateOnly result))
                     return result;
 
             throw new NotSupportedException();
diff --git a/samples/client/petstore/csharp/generichost/net8/SourceGeneration/src/Org.OpenAPITools/Client/DateOnlyNullableJsonConverter.cs b/samples/client/petstore/csharp/generichost/net8/SourceGeneration/src/Org.OpenAPITools/Client/DateOnlyNullableJsonConverter.cs
index 5e42c9efb856..79a84687d295 100644
--- a/samples/client/petstore/csharp/generichost/net8/SourceGeneration/src/Org.OpenAPITools/Client/DateOnlyNullableJsonConverter.cs
+++ b/samples/client/petstore/csharp/generichost/net8/SourceGeneration/src/Org.OpenAPITools/Client/DateOnlyNullableJsonConverter.cs
@@ -43,7 +43,7 @@ public class DateOnlyNullableJsonConverter : JsonConverter<DateOnly?>
             string value = reader.GetString()!;
 
             foreach(string format in Formats)
-                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.AdjustToUniversal | DateTimeStyles.AssumeUniversal, out DateOnly result))
+                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.None, out DateOnly result))
                     return result;
 
             throw new NotSupportedException();
diff --git a/samples/client/petstore/csharp/generichost/net9/AllOf/src/Org.OpenAPITools/Client/DateOnlyJsonConverter.cs b/samples/client/petstore/csharp/generichost/net9/AllOf/src/Org.OpenAPITools/Client/DateOnlyJsonConverter.cs
index f7fe93629939..671c407f55a0 100644
--- a/samples/client/petstore/csharp/generichost/net9/AllOf/src/Org.OpenAPITools/Client/DateOnlyJsonConverter.cs
+++ b/samples/client/petstore/csharp/generichost/net9/AllOf/src/Org.OpenAPITools/Client/DateOnlyJsonConverter.cs
@@ -43,7 +43,7 @@ public override DateOnly Read(ref Utf8JsonReader reader, Type typeToConvert, Jso
             string value = reader.GetString()!;
 
             foreach(string format in Formats)
-                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.AdjustToUniversal | DateTimeStyles.AssumeUniversal, out DateOnly result))
+                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.None, out DateOnly result))
                     return result;
 
             throw new NotSupportedException();
diff --git a/samples/client/petstore/csharp/generichost/net9/AllOf/src/Org.OpenAPITools/Client/DateOnlyNullableJsonConverter.cs b/samples/client/petstore/csharp/generichost/net9/AllOf/src/Org.OpenAPITools/Client/DateOnlyNullableJsonConverter.cs
index a5cb490f3ef1..ae9a253b5aa1 100644
--- a/samples/client/petstore/csharp/generichost/net9/AllOf/src/Org.OpenAPITools/Client/DateOnlyNullableJsonConverter.cs
+++ b/samples/client/petstore/csharp/generichost/net9/AllOf/src/Org.OpenAPITools/Client/DateOnlyNullableJsonConverter.cs
@@ -43,7 +43,7 @@ public class DateOnlyNullableJsonConverter : JsonConverter<DateOnly?>
             string value = reader.GetString()!;
 
             foreach(string format in Formats)
-                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.AdjustToUniversal | DateTimeStyles.AssumeUniversal, out DateOnly result))
+                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.None, out DateOnly result))
                     return result;
 
             throw new NotSupportedException();
diff --git a/samples/client/petstore/csharp/generichost/net9/AnyOf/src/Org.OpenAPITools/Client/DateOnlyJsonConverter.cs b/samples/client/petstore/csharp/generichost/net9/AnyOf/src/Org.OpenAPITools/Client/DateOnlyJsonConverter.cs
index 5009ae5304f7..ddd26d4eafca 100644
--- a/samples/client/petstore/csharp/generichost/net9/AnyOf/src/Org.OpenAPITools/Client/DateOnlyJsonConverter.cs
+++ b/samples/client/petstore/csharp/generichost/net9/AnyOf/src/Org.OpenAPITools/Client/DateOnlyJsonConverter.cs
@@ -43,7 +43,7 @@ public override DateOnly Read(ref Utf8JsonReader reader, Type typeToConvert, Jso
             string value = reader.GetString()!;
 
             foreach(string format in Formats)
-                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.AdjustToUniversal | DateTimeStyles.AssumeUniversal, out DateOnly result))
+                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.None, out DateOnly result))
                     return result;
 
             throw new NotSupportedException();
diff --git a/samples/client/petstore/csharp/generichost/net9/AnyOf/src/Org.OpenAPITools/Client/DateOnlyNullableJsonConverter.cs b/samples/client/petstore/csharp/generichost/net9/AnyOf/src/Org.OpenAPITools/Client/DateOnlyNullableJsonConverter.cs
index 02dda463ab26..a4e9918e0aa5 100644
--- a/samples/client/petstore/csharp/generichost/net9/AnyOf/src/Org.OpenAPITools/Client/DateOnlyNullableJsonConverter.cs
+++ b/samples/client/petstore/csharp/generichost/net9/AnyOf/src/Org.OpenAPITools/Client/DateOnlyNullableJsonConverter.cs
@@ -43,7 +43,7 @@ public class DateOnlyNullableJsonConverter : JsonConverter<DateOnly?>
             string value = reader.GetString()!;
 
             foreach(string format in Formats)
-                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.AdjustToUniversal | DateTimeStyles.AssumeUniversal, out DateOnly result))
+                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.None, out DateOnly result))
                     return result;
 
             throw new NotSupportedException();
diff --git a/samples/client/petstore/csharp/generichost/net9/AnyOfNoCompare/src/Org.OpenAPITools/Client/DateOnlyJsonConverter.cs b/samples/client/petstore/csharp/generichost/net9/AnyOfNoCompare/src/Org.OpenAPITools/Client/DateOnlyJsonConverter.cs
index 5009ae5304f7..ddd26d4eafca 100644
--- a/samples/client/petstore/csharp/generichost/net9/AnyOfNoCompare/src/Org.OpenAPITools/Client/DateOnlyJsonConverter.cs
+++ b/samples/client/petstore/csharp/generichost/net9/AnyOfNoCompare/src/Org.OpenAPITools/Client/DateOnlyJsonConverter.cs
@@ -43,7 +43,7 @@ public override DateOnly Read(ref Utf8JsonReader reader, Type typeToConvert, Jso
             string value = reader.GetString()!;
 
             foreach(string format in Formats)
-                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.AdjustToUniversal | DateTimeStyles.AssumeUniversal, out DateOnly result))
+                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.None, out DateOnly result))
                     return result;
 
             throw new NotSupportedException();
diff --git a/samples/client/petstore/csharp/generichost/net9/AnyOfNoCompare/src/Org.OpenAPITools/Client/DateOnlyNullableJsonConverter.cs b/samples/client/petstore/csharp/generichost/net9/AnyOfNoCompare/src/Org.OpenAPITools/Client/DateOnlyNullableJsonConverter.cs
index 02dda463ab26..a4e9918e0aa5 100644
--- a/samples/client/petstore/csharp/generichost/net9/AnyOfNoCompare/src/Org.OpenAPITools/Client/DateOnlyNullableJsonConverter.cs
+++ b/samples/client/petstore/csharp/generichost/net9/AnyOfNoCompare/src/Org.OpenAPITools/Client/DateOnlyNullableJsonConverter.cs
@@ -43,7 +43,7 @@ public class DateOnlyNullableJsonConverter : JsonConverter<DateOnly?>
             string value = reader.GetString()!;
 
             foreach(string format in Formats)
-                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.AdjustToUniversal | DateTimeStyles.AssumeUniversal, out DateOnly result))
+                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.None, out DateOnly result))
                     return result;
 
             throw new NotSupportedException();
diff --git a/samples/client/petstore/csharp/generichost/net9/FormModels/src/Org.OpenAPITools/Client/DateOnlyJsonConverter.cs b/samples/client/petstore/csharp/generichost/net9/FormModels/src/Org.OpenAPITools/Client/DateOnlyJsonConverter.cs
index 11b100056516..74dd3f152183 100644
--- a/samples/client/petstore/csharp/generichost/net9/FormModels/src/Org.OpenAPITools/Client/DateOnlyJsonConverter.cs
+++ b/samples/client/petstore/csharp/generichost/net9/FormModels/src/Org.OpenAPITools/Client/DateOnlyJsonConverter.cs
@@ -43,7 +43,7 @@ public override DateOnly Read(ref Utf8JsonReader reader, Type typeToConvert, Jso
             string value = reader.GetString();
 
             foreach(string format in Formats)
-                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.AdjustToUniversal | DateTimeStyles.AssumeUniversal, out DateOnly result))
+                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.None, out DateOnly result))
                     return result;
 
             throw new NotSupportedException();
diff --git a/samples/client/petstore/csharp/generichost/net9/FormModels/src/Org.OpenAPITools/Client/DateOnlyNullableJsonConverter.cs b/samples/client/petstore/csharp/generichost/net9/FormModels/src/Org.OpenAPITools/Client/DateOnlyNullableJsonConverter.cs
index 92ef8f6c92bf..e017a70ec492 100644
--- a/samples/client/petstore/csharp/generichost/net9/FormModels/src/Org.OpenAPITools/Client/DateOnlyNullableJsonConverter.cs
+++ b/samples/client/petstore/csharp/generichost/net9/FormModels/src/Org.OpenAPITools/Client/DateOnlyNullableJsonConverter.cs
@@ -43,7 +43,7 @@ public class DateOnlyNullableJsonConverter : JsonConverter<DateOnly?>
             string value = reader.GetString();
 
             foreach(string format in Formats)
-                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.AdjustToUniversal | DateTimeStyles.AssumeUniversal, out DateOnly result))
+                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.None, out DateOnly result))
                     return result;
 
             throw new NotSupportedException();
diff --git a/samples/client/petstore/csharp/generichost/net9/NullReferenceTypes/src/Org.OpenAPITools/Client/DateOnlyJsonConverter.cs b/samples/client/petstore/csharp/generichost/net9/NullReferenceTypes/src/Org.OpenAPITools/Client/DateOnlyJsonConverter.cs
index c9dc766e4639..04b243233ad5 100644
--- a/samples/client/petstore/csharp/generichost/net9/NullReferenceTypes/src/Org.OpenAPITools/Client/DateOnlyJsonConverter.cs
+++ b/samples/client/petstore/csharp/generichost/net9/NullReferenceTypes/src/Org.OpenAPITools/Client/DateOnlyJsonConverter.cs
@@ -43,7 +43,7 @@ public override DateOnly Read(ref Utf8JsonReader reader, Type typeToConvert, Jso
             string value = reader.GetString()!;
 
             foreach(string format in Formats)
-                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.AdjustToUniversal | DateTimeStyles.AssumeUniversal, out DateOnly result))
+                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.None, out DateOnly result))
                     return result;
 
             throw new NotSupportedException();
diff --git a/samples/client/petstore/csharp/generichost/net9/NullReferenceTypes/src/Org.OpenAPITools/Client/DateOnlyNullableJsonConverter.cs b/samples/client/petstore/csharp/generichost/net9/NullReferenceTypes/src/Org.OpenAPITools/Client/DateOnlyNullableJsonConverter.cs
index 5e42c9efb856..79a84687d295 100644
--- a/samples/client/petstore/csharp/generichost/net9/NullReferenceTypes/src/Org.OpenAPITools/Client/DateOnlyNullableJsonConverter.cs
+++ b/samples/client/petstore/csharp/generichost/net9/NullReferenceTypes/src/Org.OpenAPITools/Client/DateOnlyNullableJsonConverter.cs
@@ -43,7 +43,7 @@ public class DateOnlyNullableJsonConverter : JsonConverter<DateOnly?>
             string value = reader.GetString()!;
 
             foreach(string format in Formats)
-                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.AdjustToUniversal | DateTimeStyles.AssumeUniversal, out DateOnly result))
+                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.None, out DateOnly result))
                     return result;
 
             throw new NotSupportedException();
diff --git a/samples/client/petstore/csharp/generichost/net9/OneOf/src/Org.OpenAPITools/Client/DateOnlyJsonConverter.cs b/samples/client/petstore/csharp/generichost/net9/OneOf/src/Org.OpenAPITools/Client/DateOnlyJsonConverter.cs
index 5009ae5304f7..ddd26d4eafca 100644
--- a/samples/client/petstore/csharp/generichost/net9/OneOf/src/Org.OpenAPITools/Client/DateOnlyJsonConverter.cs
+++ b/samples/client/petstore/csharp/generichost/net9/OneOf/src/Org.OpenAPITools/Client/DateOnlyJsonConverter.cs
@@ -43,7 +43,7 @@ public override DateOnly Read(ref Utf8JsonReader reader, Type typeToConvert, Jso
             string value = reader.GetString()!;
 
             foreach(string format in Formats)
-                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.AdjustToUniversal | DateTimeStyles.AssumeUniversal, out DateOnly result))
+                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.None, out DateOnly result))
                     return result;
 
             throw new NotSupportedException();
diff --git a/samples/client/petstore/csharp/generichost/net9/OneOf/src/Org.OpenAPITools/Client/DateOnlyNullableJsonConverter.cs b/samples/client/petstore/csharp/generichost/net9/OneOf/src/Org.OpenAPITools/Client/DateOnlyNullableJsonConverter.cs
index 02dda463ab26..a4e9918e0aa5 100644
--- a/samples/client/petstore/csharp/generichost/net9/OneOf/src/Org.OpenAPITools/Client/DateOnlyNullableJsonConverter.cs
+++ b/samples/client/petstore/csharp/generichost/net9/OneOf/src/Org.OpenAPITools/Client/DateOnlyNullableJsonConverter.cs
@@ -43,7 +43,7 @@ public class DateOnlyNullableJsonConverter : JsonConverter<DateOnly?>
             string value = reader.GetString()!;
 
             foreach(string format in Formats)
-                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.AdjustToUniversal | DateTimeStyles.AssumeUniversal, out DateOnly result))
+                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.None, out DateOnly result))
                     return result;
 
             throw new NotSupportedException();
diff --git a/samples/client/petstore/csharp/generichost/net9/Petstore/src/Org.OpenAPITools/Client/DateOnlyJsonConverter.cs b/samples/client/petstore/csharp/generichost/net9/Petstore/src/Org.OpenAPITools/Client/DateOnlyJsonConverter.cs
index 11b100056516..74dd3f152183 100644
--- a/samples/client/petstore/csharp/generichost/net9/Petstore/src/Org.OpenAPITools/Client/DateOnlyJsonConverter.cs
+++ b/samples/client/petstore/csharp/generichost/net9/Petstore/src/Org.OpenAPITools/Client/DateOnlyJsonConverter.cs
@@ -43,7 +43,7 @@ public override DateOnly Read(ref Utf8JsonReader reader, Type typeToConvert, Jso
             string value = reader.GetString();
 
             foreach(string format in Formats)
-                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.AdjustToUniversal | DateTimeStyles.AssumeUniversal, out DateOnly result))
+                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.None, out DateOnly result))
                     return result;
 
             throw new NotSupportedException();
diff --git a/samples/client/petstore/csharp/generichost/net9/Petstore/src/Org.OpenAPITools/Client/DateOnlyNullableJsonConverter.cs b/samples/client/petstore/csharp/generichost/net9/Petstore/src/Org.OpenAPITools/Client/DateOnlyNullableJsonConverter.cs
index 92ef8f6c92bf..e017a70ec492 100644
--- a/samples/client/petstore/csharp/generichost/net9/Petstore/src/Org.OpenAPITools/Client/DateOnlyNullableJsonConverter.cs
+++ b/samples/client/petstore/csharp/generichost/net9/Petstore/src/Org.OpenAPITools/Client/DateOnlyNullableJsonConverter.cs
@@ -43,7 +43,7 @@ public class DateOnlyNullableJsonConverter : JsonConverter<DateOnly?>
             string value = reader.GetString();
 
             foreach(string format in Formats)
-                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.AdjustToUniversal | DateTimeStyles.AssumeUniversal, out DateOnly result))
+                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.None, out DateOnly result))
                     return result;
 
             throw new NotSupportedException();
diff --git a/samples/client/petstore/csharp/generichost/net9/SourceGeneration/src/Org.OpenAPITools/Client/DateOnlyJsonConverter.cs b/samples/client/petstore/csharp/generichost/net9/SourceGeneration/src/Org.OpenAPITools/Client/DateOnlyJsonConverter.cs
index c9dc766e4639..04b243233ad5 100644
--- a/samples/client/petstore/csharp/generichost/net9/SourceGeneration/src/Org.OpenAPITools/Client/DateOnlyJsonConverter.cs
+++ b/samples/client/petstore/csharp/generichost/net9/SourceGeneration/src/Org.OpenAPITools/Client/DateOnlyJsonConverter.cs
@@ -43,7 +43,7 @@ public override DateOnly Read(ref Utf8JsonReader reader, Type typeToConvert, Jso
             string value = reader.GetString()!;
 
             foreach(string format in Formats)
-                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.AdjustToUniversal | DateTimeStyles.AssumeUniversal, out DateOnly result))
+                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.None, out DateOnly result))
                     return result;
 
             throw new NotSupportedException();
diff --git a/samples/client/petstore/csharp/generichost/net9/SourceGeneration/src/Org.OpenAPITools/Client/DateOnlyNullableJsonConverter.cs b/samples/client/petstore/csharp/generichost/net9/SourceGeneration/src/Org.OpenAPITools/Client/DateOnlyNullableJsonConverter.cs
index 5e42c9efb856..79a84687d295 100644
--- a/samples/client/petstore/csharp/generichost/net9/SourceGeneration/src/Org.OpenAPITools/Client/DateOnlyNullableJsonConverter.cs
+++ b/samples/client/petstore/csharp/generichost/net9/SourceGeneration/src/Org.OpenAPITools/Client/DateOnlyNullableJsonConverter.cs
@@ -43,7 +43,7 @@ public class DateOnlyNullableJsonConverter : JsonConverter<DateOnly?>
             string value = reader.GetString()!;
 
             foreach(string format in Formats)
-                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.AdjustToUniversal | DateTimeStyles.AssumeUniversal, out DateOnly result))
+                if (DateOnly.TryParseExact(value, format, CultureInfo.InvariantCulture, DateTimeStyles.None, out DateOnly result))
                     return result;
 
             throw new NotSupportedException();