diff --git a/src/Humanizer.Tests/Humanizer.Tests.csproj b/src/Humanizer.Tests/Humanizer.Tests.csproj
index 2284164ab..c712a21ac 100644
--- a/src/Humanizer.Tests/Humanizer.Tests.csproj
+++ b/src/Humanizer.Tests/Humanizer.Tests.csproj
@@ -154,10 +154,10 @@
     <Compile Include="Localisation\it\CollectionFormatterTests.cs" />
     <Compile Include="Localisation\it\OrdinalizerTests.cs" />
     <Compile Include="Localisation\it\NumberToWordsTests.cs" />
-    <Compile Include="Localisation\zh-CHS\DateHumanizeTests.cs" />
-    <Compile Include="Localisation\zh-CHS\TimeSpanHumanizeTests.cs" />
-    <Compile Include="Localisation\zh-CHT\DateHumanizeTests.cs" />
-    <Compile Include="Localisation\zh-CHT\TimeSpanHumanizeTests.cs" />
+    <Compile Include="Localisation\zh-Hans\DateHumanizeTests.cs" />
+    <Compile Include="Localisation\zh-Hans\TimeSpanHumanizeTests.cs" />
+    <Compile Include="Localisation\zh-Hant\DateHumanizeTests.cs" />
+    <Compile Include="Localisation\zh-Hant\TimeSpanHumanizeTests.cs" />
     <Compile Include="Localisation\zh-CN\DateHumanizeTests.cs" />
     <Compile Include="Localisation\zh-CN\TimeSpanHumanizeTests.cs" />
     <Compile Include="ResourceKeyTests.cs" />
diff --git a/src/Humanizer.Tests/Localisation/zh-CHS/DateHumanizeTests.cs b/src/Humanizer.Tests/Localisation/zh-Hans/DateHumanizeTests.cs
similarity index 96%
rename from src/Humanizer.Tests/Localisation/zh-CHS/DateHumanizeTests.cs
rename to src/Humanizer.Tests/Localisation/zh-Hans/DateHumanizeTests.cs
index 5128f65a7..da0236bf1 100644
--- a/src/Humanizer.Tests/Localisation/zh-CHS/DateHumanizeTests.cs
+++ b/src/Humanizer.Tests/Localisation/zh-Hans/DateHumanizeTests.cs
@@ -1,11 +1,11 @@
 using Humanizer.Localisation;
 using Xunit.Extensions;
 
-namespace Humanizer.Tests.Localisation.zhCHS
+namespace Humanizer.Tests.Localisation.zhHans
 {
     public class DateHumanizeTests : AmbientCulture
     {
-        public DateHumanizeTests() : base("zh-CHS") { }
+        public DateHumanizeTests() : base("zh-Hans") { }
 
         [Theory]
         [InlineData(2, "2 天前")]
diff --git a/src/Humanizer.Tests/Localisation/zh-CHS/TimeSpanHumanizeTests.cs b/src/Humanizer.Tests/Localisation/zh-Hans/TimeSpanHumanizeTests.cs
similarity index 94%
rename from src/Humanizer.Tests/Localisation/zh-CHS/TimeSpanHumanizeTests.cs
rename to src/Humanizer.Tests/Localisation/zh-Hans/TimeSpanHumanizeTests.cs
index 24f05c307..0d94ae71b 100644
--- a/src/Humanizer.Tests/Localisation/zh-CHS/TimeSpanHumanizeTests.cs
+++ b/src/Humanizer.Tests/Localisation/zh-Hans/TimeSpanHumanizeTests.cs
@@ -2,11 +2,11 @@
 using Xunit;
 using Xunit.Extensions;
 
-namespace Humanizer.Tests.Localisation.zhCHS
+namespace Humanizer.Tests.Localisation.zhHans
 {
     public class TimeSpanHumanizeTests : AmbientCulture
     {
-        public TimeSpanHumanizeTests() : base("zh-CHS") { }
+        public TimeSpanHumanizeTests() : base("zh-Hans") { }
 
         [Theory]
         [InlineData(7, "1 周")]
diff --git a/src/Humanizer.Tests/Localisation/zh-CHT/DateHumanizeTests.cs b/src/Humanizer.Tests/Localisation/zh-Hant/DateHumanizeTests.cs
similarity index 96%
rename from src/Humanizer.Tests/Localisation/zh-CHT/DateHumanizeTests.cs
rename to src/Humanizer.Tests/Localisation/zh-Hant/DateHumanizeTests.cs
index 655c90bcb..99ecb5ca5 100644
--- a/src/Humanizer.Tests/Localisation/zh-CHT/DateHumanizeTests.cs
+++ b/src/Humanizer.Tests/Localisation/zh-Hant/DateHumanizeTests.cs
@@ -1,11 +1,11 @@
 using Humanizer.Localisation;
 using Xunit.Extensions;
 
-namespace Humanizer.Tests.Localisation.zhCHT
+namespace Humanizer.Tests.Localisation.zhHant
 {
     public class DateHumanizeTests : AmbientCulture
     {
-        public DateHumanizeTests() : base("zh-CHT") { }
+        public DateHumanizeTests() : base("zh-Hant") { }
 
         [Theory]
         [InlineData(2, "2 天前")]
diff --git a/src/Humanizer.Tests/Localisation/zh-CHT/TimeSpanHumanizeTests.cs b/src/Humanizer.Tests/Localisation/zh-Hant/TimeSpanHumanizeTests.cs
similarity index 94%
rename from src/Humanizer.Tests/Localisation/zh-CHT/TimeSpanHumanizeTests.cs
rename to src/Humanizer.Tests/Localisation/zh-Hant/TimeSpanHumanizeTests.cs
index 42df0b32d..459c5e158 100644
--- a/src/Humanizer.Tests/Localisation/zh-CHT/TimeSpanHumanizeTests.cs
+++ b/src/Humanizer.Tests/Localisation/zh-Hant/TimeSpanHumanizeTests.cs
@@ -2,11 +2,11 @@
 using Xunit;
 using Xunit.Extensions;
 
-namespace Humanizer.Tests.Localisation.zhCHT
+namespace Humanizer.Tests.Localisation.zhHant
 {
     public class TimeSpanHumanizeTests : AmbientCulture
     {
-        public TimeSpanHumanizeTests() : base("zh-CHT") { }
+        public TimeSpanHumanizeTests() : base("zh-Hant") { }
 
         [Theory]
         [InlineData(7, "1 周")]
diff --git a/src/Humanizer/Configuration/FormatterRegistry.cs b/src/Humanizer/Configuration/FormatterRegistry.cs
index b2392dca1..59f296d81 100644
--- a/src/Humanizer/Configuration/FormatterRegistry.cs
+++ b/src/Humanizer/Configuration/FormatterRegistry.cs
@@ -42,8 +42,8 @@ public FormatterRegistry() : base(new DefaultFormatter("en-US"))
             RegisterDefaultFormatter("uz-Latn-UZ");
             RegisterDefaultFormatter("uz-Cyrl-UZ");
             RegisterDefaultFormatter("zh-CN");
-            RegisterDefaultFormatter("zh-CHS");
-            RegisterDefaultFormatter("zh-CHT");
+            RegisterDefaultFormatter("zh-Hans");
+            RegisterDefaultFormatter("zh-Hant");
         }
 
         private void RegisterDefaultFormatter(string localeCode)
diff --git a/src/Humanizer/Humanizer.csproj b/src/Humanizer/Humanizer.csproj
index 048cef089..46e7911ee 100644
--- a/src/Humanizer/Humanizer.csproj
+++ b/src/Humanizer/Humanizer.csproj
@@ -182,13 +182,11 @@
     <None Include="Humanizer.snk" />
   </ItemGroup>
   <ItemGroup>
-    <EmbeddedResource Include="Properties\Resources.zh-CHT.resx">
-      <Generator>ResXFileCodeGenerator</Generator>
-      <LastGenOutput>Resources.zh-CHT.Designer.cs</LastGenOutput>
+    <EmbeddedResource Include="Properties\Resources.zh-Hant.resx">
+      <LastGenOutput>Resources.zh-Hant.Designer.cs</LastGenOutput>
     </EmbeddedResource>
-    <EmbeddedResource Include="Properties\Resources.zh-CHS.resx">
-      <Generator>ResXFileCodeGenerator</Generator>
-      <LastGenOutput>Resources.zh-CHS.Designer.cs</LastGenOutput>
+    <EmbeddedResource Include="Properties\Resources.zh-Hans.resx">
+      <LastGenOutput>Resources.zh-Hans.Designer.cs</LastGenOutput>
     </EmbeddedResource>
     <EmbeddedResource Include="Properties\Resources.zh-CN.resx">
       <Generator>ResXFileCodeGenerator</Generator>
diff --git a/src/Humanizer/Properties/Resources.zh-CHS.resx b/src/Humanizer/Properties/Resources.zh-Hans.resx
similarity index 100%
rename from src/Humanizer/Properties/Resources.zh-CHS.resx
rename to src/Humanizer/Properties/Resources.zh-Hans.resx
diff --git a/src/Humanizer/Properties/Resources.zh-CHT.resx b/src/Humanizer/Properties/Resources.zh-Hant.resx
similarity index 100%
rename from src/Humanizer/Properties/Resources.zh-CHT.resx
rename to src/Humanizer/Properties/Resources.zh-Hant.resx