diff --git a/xCAT-server/share/xcat/install/sles/service.sle15.tmpl b/xCAT-server/share/xcat/install/sles/service.sle15.tmpl
index e75529258..b1ed324ea 100644
--- a/xCAT-server/share/xcat/install/sles/service.sle15.tmpl
+++ b/xCAT-server/share/xcat/install/sles/service.sle15.tmpl
@@ -12,7 +12,7 @@
     </bootloader>
     <general>
       <clock>
-        <hwclock>GMT</hwclock>
+        <hwclock>UTC</hwclock>
         <timezone>#TABLE:site:key=timezone:value#</timezone>
       </clock>
       <keyboard>