diff --git a/xwords4/android/scripts/genvers.sh b/xwords4/android/scripts/genvers.sh
index 539596ecb..e74835ed0 100755
--- a/xwords4/android/scripts/genvers.sh
+++ b/xwords4/android/scripts/genvers.sh
@@ -37,7 +37,7 @@ class BuildConstants {
     public static final short CLIENT_VERS_RELAY = $CLIENT_VERS_RELAY;
     public static final boolean CHAT_SUPPORTED = $CHAT_SUPPORTED;
     public static final boolean THUMBNAIL_SUPPORTED = $THUMBNAIL_SUPPORTED;
-    public static final String BUILD_STAMP = "$(date)";
+    public static final String BUILD_STAMP = "$(date +'%F at %R%Z')";
 }
 EOF