Welcome the Technical Support section. Help us in assisting you by providing us with a concise and descriptive elaboration of your issues. Be specific and if possible, provide us with a step-by-step instruction in replicating your problem.
do you mean for the date format, if so. please follow this steps:
1. copy default.php From: /administrator/components/com_community/views/activities/tmpl To: /administrator/templates/isis/html/com_community/activities/ (make new folder first)
2. edit that new file at line 135: