diff --git a/src/GitHubExtensionServer/appsettings.json b/src/GitHubExtensionServer/appsettings.json
index 5ddd1d1..a96f270 100644
--- a/src/GitHubExtensionServer/appsettings.json
+++ b/src/GitHubExtensionServer/appsettings.json
@@ -6,7 +6,7 @@
       {
         "Name": "Console",
         "Args": {
-          "outputTemplate": "[{Timestamp:yyyy/mm/dd HH:mm:ss.fff} {Level:u3}] ({SourceContext}) {Message:lj}{NewLine}{Exception}",
+          "outputTemplate": "[{Timestamp:yyyy/MM/dd HH:mm:ss.fff} {Level:u3}] ({SourceContext}) {Message:lj}{NewLine}{Exception}",
           "restrictedToMinimumLevel": "Debug"
         }
       },
@@ -14,7 +14,7 @@
         "Name": "File",
         "Args": {
           "path": "%DEVHOME_LOGS_ROOT%\\log.dhlog",
-          "outputTemplate": "[{Timestamp:yyyy/mm/dd HH:mm:ss.fff} {Level:u3}] ({SourceContext}) {Message:lj}{NewLine}{Exception}",
+          "outputTemplate": "[{Timestamp:yyyy/MM/dd HH:mm:ss.fff} {Level:u3}] ({SourceContext}) {Message:lj}{NewLine}{Exception}",
           "restrictedToMinimumLevel": "Information",
           "rollingInterval": "Day"
         }
diff --git a/test/Console/appsettings.json b/test/Console/appsettings.json
index 918d6f6..ad28c78 100644
--- a/test/Console/appsettings.json
+++ b/test/Console/appsettings.json
@@ -6,7 +6,7 @@
       {
         "Name": "Console",
         "Args": {
-          "outputTemplate": "[{Timestamp:yyyy/mm/dd HH:mm:ss.fff} {Level:u3}] ({SourceContext}) {Message:lj}{NewLine}{Exception}",
+          "outputTemplate": "[{Timestamp:yyyy/MM/dd HH:mm:ss.fff} {Level:u3}] ({SourceContext}) {Message:lj}{NewLine}{Exception}",
           "restrictedToMinimumLevel": "Debug"
         }
       },
@@ -14,7 +14,7 @@
         "Name": "File",
         "Args": {
           "path": "%DEVHOME_LOGS_ROOT%\\log.dhlog",
-          "outputTemplate": "[{Timestamp:yyyy/mm/dd HH:mm:ss.fff} {Level:u3}] ({SourceContext}) {Message:lj}{NewLine}{Exception}",
+          "outputTemplate": "[{Timestamp:yyyy/MM/dd HH:mm:ss.fff} {Level:u3}] ({SourceContext}) {Message:lj}{NewLine}{Exception}",
           "restrictedToMinimumLevel": "Information",
           "rollingInterval": "Day"
         }
diff --git a/test/GitHubExtension/Helpers/TestSetupHelpers.cs b/test/GitHubExtension/Helpers/TestSetupHelpers.cs
index ee5f7de..9242616 100644
--- a/test/GitHubExtension/Helpers/TestSetupHelpers.cs
+++ b/test/GitHubExtension/Helpers/TestSetupHelpers.cs
@@ -77,11 +77,11 @@ public static void ConfigureTestLog(TestOptions options, TestContext context)
             .WriteTo.File(
                 path: GetLogFilePath(options),
                 formatProvider: CultureInfo.InvariantCulture,
-                outputTemplate: "[{Timestamp:yyyy/mm/dd HH:mm:ss.fff} {Level:u3}] ({SourceContext}) {Message:lj}{NewLine}{Exception}")
+                outputTemplate: "[{Timestamp:yyyy/MM/dd HH:mm:ss.fff} {Level:u3}] ({SourceContext}) {Message:lj}{NewLine}{Exception}")
             .WriteTo.TestContextSink(
                 context: context,
                 formatProvider: CultureInfo.InvariantCulture,
-                outputTemplate: "[{Timestamp:yyyy/mm/dd HH:mm:ss.fff} {Level:u3}] ({SourceContext}) {Message:lj}{NewLine}{Exception}")
+                outputTemplate: "[{Timestamp:yyyy/MM/dd HH:mm:ss.fff} {Level:u3}] ({SourceContext}) {Message:lj}{NewLine}{Exception}")
             .CreateLogger();
     }