<% Root.longdateformat %>
macro renders a chooser for the longdateformat

Sourcecode in Root/sysmgr_macros.js:
1:   function longdateformat_macro(param) {
2:      if (!session.user.sysadmin)
3:         return;
4:      renderDateformatChooser("longdateformat", root.getLocale(), this.longdateformat);
5:      return;
6:   }