Store the commit date in version.h, and in the DLL properties.

src/commit_id.bat

 @echo off
-echo|set /p=#define COMMIT_HASH > %~dp0\common\commit.h
-(git rev-parse --short=12 HEAD >> %~dp0\common\commit.h) || (echo badf00dbad00 >> %~dp0\common\commit.h) > NUL
+
+REM commit hash
\ No newline at end of file
+(FOR /F "delims=" %%i IN ('call git rev-parse --short^=12 HEAD') DO set _Str=%%i) || (set _Str=badf00dbad00)
+set _Str=#define COMMIT_HASH %_Str%
+echo %_Str% > %~dp0\common\commit.h
+
+REM commit date
+(FOR /F "delims=" %%i IN ('git show -s --format^="%%ci" HEAD') DO set _Str=%%i) || (set _Str=Unknown Date)
+set _Str=#define COMMIT_DATE "%_Str%"
+echo %_Str% >> %~dp0\common\commit.h

src/common/version.h

 #include "commit.h"
 
-#define MAJOR_VERSION 3
-#define MINOR_VERSION 0
+#define MAJOR_VERSION 2
+#define MINOR_VERSION 1
 
 #define STRINGIFY(x) #x
 #define MACRO_STRINGIFY(x) STRINGIFY(x)

src/libEGL/libEGL.rc

@@ -78,6 +78,7 @@ BEGIN
             VALUE "PrivateBuild", VERSION_STRING
             VALUE "ProductName", "ANGLE libEGL Dynamic Link Library"
             VALUE "ProductVersion", VERSION_STRING
+            VALUE "Comments", "Build Date: " COMMIT_DATE
         END
     END
     BLOCK "VarFileInfo"

src/libGLESv2/libGLESv2.rc

@@ -78,6 +78,7 @@ BEGIN
             VALUE "PrivateBuild", VERSION_STRING
             VALUE "ProductName", "ANGLE libGLESv2 Dynamic Link Library"
             VALUE "ProductVersion", VERSION_STRING
+            VALUE "Comments", "Build Date: " COMMIT_DATE
         END
     END
     BLOCK "VarFileInfo"