Thanks Zoltan.
I’ve added the line you suggest to the body tag in the main_template file, but there has been no change in the date format.
Right now, the body tag looks as follows:
<body tal:define="isRTL portal_state/is_rtl;
sl python:plone_view.have_portlets('plone.leftcolumn', view);
sr python:plone_view.have_portlets('plone.rightcolumn', view);
body_class python:plone_view.bodyClass(template, view);
classes python:context.restrictedTraverse('@@sunburstview').getColumnsClasses(view)"
tal:attributes="class body_class;
dir python:isRTL and 'rtl' or 'ltr'" ex:formats="date{time-zone:4;template:'yyyy/MM/dd'; show:date}”>
Was wondering if it could be either a cache related issue, a syntax error or if the attribute should go elsewhere.