diff --git a/HISTORY.md b/HISTORY.md
index 485b623..4f742c0 100644
--- a/HISTORY.md
+++ b/HISTORY.md
@@ -6,6 +6,9 @@ Release available for download on [GitHub](https://github.com/microsoft/DirectXT
 
 ## Release History
 
+### March 6, 2024
+* Xbox Auxiliary tiling/detiling code optimization
+
 ### February 21, 2024
 * TGA reader now limited to 4 GB for maximum image size for security hardening
 * Project updates for improved logging of shader compilation errors and GDK validation
diff --git a/README.md b/README.md
index bd47a6a..f9df172 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,7 @@ http://go.microsoft.com/fwlink/?LinkId=248926
 
 Copyright (c) Microsoft Corporation.
 
-**February 21, 2024**
+**March 6, 2024**
 
 This package contains DirectXTex, a shared source library for reading and writing ``.DDS`` files, and performing various texture content processing operations including resizing, format conversion, mip-map generation, block compression for Direct3D runtime texture resources, and height-map to normal-map conversion. This library makes use of the Windows Image Component (WIC) APIs. It also includes ``.TGA`` and ``.HDR`` readers and writers since these image file formats are commonly used for texture content processing pipelines, but are not currently supported by a built-in WIC codec.