diff --git a/Porting_Vector_Intrinsics/bk_main.xml b/Porting_Vector_Intrinsics/bk_main.xml
index da233a6..7ea9596 100644
--- a/Porting_Vector_Intrinsics/bk_main.xml
+++ b/Porting_Vector_Intrinsics/bk_main.xml
@@ -69,7 +69,7 @@
     <revhistory>
       <!-- TODO: Update as new revisions created -->
       <revision>
-          <date>2018-3-14</date>
+          <date>2018-03-14</date>
           <revdescription>
             <itemizedlist spacing="compact">
               <listitem>